/* ================================================
   三奕胶粘官网 · 全局样式
   设计参考：德莎官网 + 百越胶粘官网风格
   主色调：深青灰 + 琥珀橙点缀
   ================================================ */

/* ===== 全局变量 ===== */
:root {
    /* 主色调 - 深青灰系 */
    --color-primary: #1e3a5f;         /* 深青主色 - 专业稳重 */
    --color-primary-dark: #0f2744;    /* 更深青灰 - 文字/导航 */
    --color-primary-light: #2d4a6f;   /* 较浅青灰 - 悬停/边框 */
    --color-primary-soft: #3d5a7f;    /* 柔和青灰 - 辅助元素 */

    /* 点缀色 - 琥珀橙系 */
    --color-accent: #f59e0b;          /* 琥珀橙 - 主按钮/强调 */
    --color-accent-dark: #d97706;     /* 深琥珀 - 按钮悬停 */
    --color-accent-light: #fbbf24;    /* 浅琥珀 - 高亮/徽章 */
    --color-accent-glow: rgba(245, 158, 11, 0.12); /* 琥珀光晕 */

    /* 文字颜色 */
    --color-text: #1f2937;            /* 深灰黑 - 正文 */
    --color-text-light: #4b5563;      /* 中灰 - 次要文字 */
    --color-text-lighter: #9ca3af;     /* 浅灰 - 辅助文字 */
    --color-text-white: #f9fafb;      /* 近白 - 深色背景文字 */

    /* 背景颜色 */
    --color-bg: #ffffff;              /* 纯白背景 */
    --color-bg-gray: #f8fafc;          /* 极浅灰 - 卡片/区块背景 */
    --color-bg-dark: #1e3a5f;          /* 深青灰背景区 */
    --color-bg-darker: #0f2744;        /* 更深背景 - 底部/footer */

    /* 边框颜色 */
    --color-border: rgba(30, 58, 95, 0.08); /* 浅灰边框 */
    --color-border-light: #e5e7eb;    /* 浅灰边框 */
    --color-border-dark: rgba(255, 255, 255, 0.1); /* 深色背景边框 */

    /* 阴影 - 更柔和 */
    --shadow-sm: 0 1px 2px rgba(30, 58, 95, 0.04);
    --shadow-md: 0 4px 16px rgba(30, 58, 95, 0.06);
    --shadow-lg: 0 8px 32px rgba(30, 58, 95, 0.08);
    --shadow-hover: 0 12px 40px rgba(30, 58, 95, 0.1);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-button: 8px;
    --radius-card: 14px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent);
}

img {
    max-width: 100%;
    display: block;
}

h1, h2, h3, h4 {
    line-height: 1.4;
    font-weight: 700;
    color: var(--color-primary-dark);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* ===== 通用容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

/* ===== 章节标题通用样式 ===== */
.section-head {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 14px;
    padding: 4px 14px;
    background: rgba(237, 137, 54, 0.08);
    border-radius: 20px;
}

.section-title {
    font-size: 38px;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.section-title .accent {
    color: var(--color-accent);
}

.section-title .accent-light {
    color: var(--color-accent-light);
}

.section-head.light .section-title {
    color: #fff;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.8;
}

.section-head.light .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.section-more {
    text-align: center;
    margin-top: 48px;
}

/* ===== 按钮通用样式 ===== */
.btn-primary,
.btn-secondary,
.btn-outline,
.btn-quote,
.btn-1688-head,
.btn-1688-large {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 30px;
    border-radius: var(--radius-button);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    line-height: 1;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 3px 10px rgba(245, 158, 11, 0.22);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(245, 158, 11, 0.28);
    color: #fff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    background: #fff;
    color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 11px 28px;
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-1px);
}

.btn-quote {
    background: var(--color-accent);
    color: #fff;
    padding: 11px 28px;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.25);
}

.btn-quote:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
    color: #fff;
}

.btn-large {
    padding: 16px 40px;
    font-size: 16px;
}

/* ===== 顶部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #fff;
    box-shadow: 0 2px 20px rgba(30, 58, 95, 0.08);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 30px rgba(30, 58, 95, 0.12);
}

/* 欢迎条 */
.header-welcome-bar {
    background: #f0f4f8;
    color: var(--color-primary-dark);
    text-align: center;
    padding: 6px 0;
    font-size: 13px;
    letter-spacing: 1px;
    font-weight: 500;
    border-bottom: 1px solid rgba(30, 58, 95, 0.06);
}

/* 第一行：Logo + 广告语 + 询价按钮 */
.header-top {
    background: #fff;
    padding: 14px 0;
    border-bottom: 1px solid rgba(30, 58, 95, 0.06);
}

.header-top-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    flex-shrink: 0;
}

.header-logo img {
    height: 60px;
    width: auto;
}

.header-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.header-logo-text strong {
    font-size: 26px;
    font-weight: 800;
    color: var(--color-primary-dark);
    letter-spacing: 1px;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.header-logo-text small {
    font-size: 11px;
    color: var(--color-text-light);
    font-weight: 500;
    letter-spacing: 3px;
    margin-top: 3px;
}

/* 广告语 */
.header-slogan {
    flex: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 0;
}

.slogan-main {
    font-size: 20px;
    font-weight: 800;
    color: var(--color-primary-dark);
    letter-spacing: 2px;
    white-space: nowrap;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.slogan-sub {
    font-size: 13px;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 1px;
    white-space: nowrap;
}

/* 询价热线按钮 */
.header-phone {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
    padding: 12px 22px;
    background: var(--color-accent);
    color: #fff;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 3px 12px rgba(245, 158, 11, 0.22);
    position: relative;
    overflow: hidden;
    border: 2px solid var(--color-accent);
}

.header-phone:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(245, 158, 11, 0.28);
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.header-phone .phone-icon {
    font-size: 0;
    position: relative;
    z-index: 1;
    background: rgba(255,255,255,0.16);
    border-radius: 8px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-phone .phone-icon::before {
    content: "";
    width: 15px;
    height: 15px;
    border: 2px solid #fff;
    border-top: 0;
    border-right: 0;
    border-radius: 0 0 0 10px;
    transform: rotate(-38deg);
}

.header-phone .phone-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    position: relative;
    z-index: 1;
}

.header-phone .phone-text small {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.header-phone .phone-text strong {
    font-size: 18px;
    color: #fff;
    font-weight: 800;
    letter-spacing: 1px;
}

.header-store {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    min-height: 62px;
    padding: 12px 24px;
    border-radius: 8px;
    background: #ff6a00;
    color: #fff;
    font-size: 18px;
    font-weight: 900;
    letter-spacing: 1px;
    box-shadow: 0 4px 16px rgba(255, 106, 0, 0.3);
    border: 2px solid #ff6a00;
}

.header-store:hover {
    background: #e85d00;
    border-color: #e85d00;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(255, 106, 0, 0.36);
}

.mobile-menu-btn {
    display: none;
}

/* 第二行：主导航菜单 */
.header-nav {
    background: var(--color-primary-dark);
}

.header-nav-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.nav-link {
    display: block;
    padding: 18px 36px;
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.nav-link:hover {
    background: rgba(245, 158, 11, 0.95);
    color: #fff;
}

.nav-link-home {
    background: var(--color-accent);
    color: #fff;
}

.nav-link-home:hover {
    background: var(--color-accent-dark);
}

/* 产品中心下拉菜单 */
.nav-item-dropdown {
    position: relative;
}

.nav-item-dropdown .nav-link {
    cursor: pointer;
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(30, 58, 95, 0.2);
    padding: 24px;
    width: min(820px, calc(100vw - 32px));
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
    border-top: 3px solid var(--color-accent);
}

.nav-item-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.nav-dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 12px;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    background: #f8fafc;
}

.nav-dropdown-item:hover {
    background: rgba(245, 158, 11, 0.1);
    transform: translateY(-2px);
}

.nav-dropdown-item .dd-icon {
    display: none;
    flex-shrink: 0;
}

.nav-dropdown-item .dd-info h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.nav-dropdown-item .dd-info p {
    font-size: 12px;
    color: var(--color-text-light);
    line-height: 1.4;
    margin: 0;
}

/* ===== Banner 轮播 ===== */
.banner {
    margin-top: 172px;
    position: relative;
    height: 620px;
    overflow: hidden;
    color: #fff;
    padding: 0;
}

.banner-track {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
}

.banner-slide img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 0;
}

.banner-slide.active {
    opacity: 1;
    visibility: visible;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 39, 68, 0.75) 0%, rgba(30, 58, 95, 0.6) 50%, rgba(15, 39, 68, 0.7) 100%);
    z-index: 1;
}

.banner-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
    padding: 0 20px;
}

.banner-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(245, 158, 11, 0.2);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(245, 158, 11, 0.4);
    border-radius: 30px;
    font-size: 13px;
    letter-spacing: 2px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--color-accent-light);
}

.banner-content h1,
.banner-content h2 {
    font-size: 56px;
    line-height: 1.15;
    margin-bottom: 24px;
    color: #fff;
    letter-spacing: -1px;
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.banner-content .highlight {
    color: var(--color-accent-light);
    text-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
}

.banner-desc {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 32px;
    opacity: 0.95;
}

.banner-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
}

.banner-features span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 30px;
    font-size: 14px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.banner-features em {
    font-style: normal;
    color: #fbbf24;
    font-weight: 700;
}

.banner-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 左右箭头 */
.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 52px;
    height: 52px;
    background: rgba(255, 255, 255, 0.2);
    border: 1.5px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    font-size: 18px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
    backdrop-filter: blur(8px);
    font-family: inherit;
}

.banner-arrow:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-50%) scale(1.08);
}

.banner-prev {
    left: 30px;
}

.banner-next {
    right: 30px;
}

/* 小圆点 */
.banner-dots {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.banner-dot {
    width: 40px;
    height: 4px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition);
}

.banner-dot:hover {
    background: rgba(255, 255, 255, 0.7);
}

.banner-dot.active {
    background: var(--color-accent);
    width: 60px;
}

/* ===== 页面通用 Banner ===== */
.page-banner {
    margin-top: 172px;
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: #1e3a5f;
}

.page-banner img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 0;
}

.page-banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 39, 68, 0.85) 0%, rgba(30, 58, 95, 0.75) 100%);
    z-index: 1;
}

.page-banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.page-banner-content h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
    color: #fff;
}

.page-banner-content p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 产品分类列表 ===== */
.products-categories {
    padding: 100px 0;
    background: var(--color-bg);
    position: relative;
    scroll-margin-top: 190px;
}

#contactForm,
.app-detail-section,
#contact {
    scroll-margin-top: 270px;
}

.products-categories:nth-child(even) {
    background: #fff;
}

.products-categories::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(30, 58, 95, 0.1), transparent);
}

.products-categories .section-head {
    text-align: center;
    margin-bottom: 60px;
}

.products-categories .section-head .section-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    color: #fff;
    padding: 8px 24px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.products-categories .section-head .section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--color-primary-dark);
    letter-spacing: -1px;
}

.products-categories .section-head .accent {
    display: block;
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text-light);
    margin-top: 8px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.product-item {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 0;
    align-items: stretch;
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(30, 58, 95, 0.06);
    border: 1px solid rgba(30, 58, 95, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(30, 58, 95, 0.12);
    border-color: rgba(245, 158, 11, 0.2);
}

.product-item:nth-child(even) {
    grid-template-columns: 0.9fr 1.1fr;
}

.product-item:nth-child(even) .product-image {
    order: 2;
}

.product-image {
    min-height: 360px;
    background-size: cover;
    background-position: center;
    position: relative;
    transition: all 0.5s ease;
}

.product-image-neutral {
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(135deg, rgba(30, 58, 95, 0.88), rgba(15, 39, 68, 0.94)),
        repeating-linear-gradient(45deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 16px);
}

.product-image-neutral::before {
    content: attr(data-title);
    padding: 12px 20px;
    border: 1px solid rgba(255,255,255,0.22);
    border-radius: 999px;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    background: rgba(255,255,255,0.08);
}

.product-item:hover .product-image {
    transform: scale(1.03);
}

.product-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(15, 39, 68, 0.15) 100%);
    pointer-events: none;
}

.product-info {
    padding: 50px 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.product-info::before {
    content: "";
    position: absolute;
    top: 30px;
    left: 0;
    width: 4px;
    height: 48px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
    border-radius: 0 4px 4px 0;
}

.product-info h3 {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.product-info p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
    padding: 0;
}

.product-features li {
    padding: 8px 18px;
    background: rgba(30, 58, 95, 0.04);
    border: 1px solid rgba(30, 58, 95, 0.08);
    border-radius: 24px;
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 600;
    transition: all 0.3s ease;
}

.product-features li:hover {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--color-accent-dark);
}

.procurement-specs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 14px;
    margin: 0 0 24px;
    padding: 16px;
    border: 1px solid rgba(30, 58, 95, 0.08);
    border-radius: 12px;
    background: #f8fafc;
}

.procurement-specs span {
    color: var(--color-text-light);
    font-size: 13px;
    line-height: 1.55;
}

.procurement-specs strong {
    color: var(--color-primary-dark);
    font-weight: 700;
}

.product-info .btn-primary {
    align-self: flex-start;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: #fff;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
}

.product-info .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
}

.products-store-cta {
    padding: 54px 0 32px;
    background: #fff7ed;
}

.products-store-card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    align-items: center;
    padding: 30px 34px;
    border: 1px solid rgba(255, 106, 0, 0.22);
    border-radius: 18px;
    background:
        linear-gradient(135deg, rgba(255, 106, 0, 0.1), rgba(245, 158, 11, 0.08)),
        #fff;
    box-shadow: 0 12px 34px rgba(30, 58, 95, 0.08);
}

.products-store-card h2 {
    font-size: 30px;
    margin-bottom: 8px;
}

.products-store-card p {
    color: var(--color-text-light);
    margin: 0;
}

.products-store-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-end;
}

.btn-store-hero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 28px;
    border-radius: 10px;
    background: #ff6a00;
    color: #fff;
    font-size: 17px;
    font-weight: 900;
    box-shadow: 0 8px 24px rgba(255, 106, 0, 0.3);
}

.btn-store-hero:hover {
    background: #e85d00;
    color: #fff;
    transform: translateY(-1px);
}

.btn-phone-hero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 22px;
    border-radius: 10px;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 800;
}

.btn-phone-hero:hover {
    background: var(--color-primary);
    color: #fff;
}

.products-catalog {
    padding: 58px 0 88px;
    background: var(--color-bg-gray);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.catalog-card {
    display: grid;
    grid-template-rows: 190px 1fr;
    overflow: hidden;
    border: 1px solid rgba(30, 58, 95, 0.08);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 8px 26px rgba(30, 58, 95, 0.06);
    transition: var(--transition);
    scroll-margin-top: 190px;
}

.catalog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 36px rgba(30, 58, 95, 0.1);
    border-color: rgba(245, 158, 11, 0.28);
}

.catalog-media {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: zoom-in;
    background: #eef2f7;
}

.catalog-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    z-index: 0;
}

.catalog-card:hover .catalog-media img {
    transform: scale(1.06);
}

.catalog-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 39, 68, 0.1), rgba(15, 39, 68, 0.42));
    pointer-events: none;
}

.catalog-media-neutral {
    background:
        linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px),
        linear-gradient(180deg, rgba(255,255,255,0.06) 1px, transparent 1px),
        radial-gradient(circle at 20% 18%, rgba(245, 158, 11, 0.2), transparent 34%),
        linear-gradient(135deg, #17395f 0%, #0f2744 100%);
    background-size: 22px 22px, 22px 22px, auto, auto;
}

.catalog-media span {
    position: relative;
    z-index: 1;
    padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 1px;
}

.catalog-body {
    padding: 22px 22px 24px;
}

.catalog-body h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.catalog-body p {
    min-height: 72px;
    margin-bottom: 14px;
    color: var(--color-text-light);
    font-size: 14px;
    line-height: 1.65;
}

.catalog-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.catalog-specs span {
    padding: 5px 10px;
    border-radius: 999px;
    background: #f8fafc;
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 700;
}

.catalog-details {
    display: grid;
    gap: 6px;
    margin: 0 0 18px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #f8fafc;
    border: 1px solid rgba(30, 58, 95, 0.06);
}

.catalog-details span {
    color: var(--color-text-light);
    font-size: 13px;
    line-height: 1.6;
}

.catalog-actions {
    display: flex;
    gap: 10px;
}

.catalog-actions a {
    flex: 1;
    justify-content: center;
    padding: 11px 14px;
    font-size: 13px;
}

/* ===== 核心数据区 ===== */
.stats {
    background: #17395f;
    color: #fff;
    padding: 42px 0;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: "";
    position: absolute;
    inset: 0;
    width: auto;
    height: auto;
    background:
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(180deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 72px 72px;
    border-radius: 50%;
    opacity: 0.45;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    position: relative;
    z-index: 1;
}

.stat-item {
    min-height: 188px;
    padding: 26px 24px 24px;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.055);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
    backdrop-filter: blur(4px);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 22px;
    width: 3px;
    height: 42px;
    border-radius: 0 4px 4px 0;
    background: var(--color-accent);
}

.stat-kicker {
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.52);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
}

.stat-main {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 10px;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    letter-spacing: -1px;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.stat-unit {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-accent-light);
}

.stat-text-main {
    min-height: 48px;
    color: #fff;
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.stat-label {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.92);
    font-size: 16px;
    font-weight: 700;
    line-height: 1.55;
}

.stat-note {
    margin: 0;
    color: rgba(255, 255, 255, 0.66);
    font-size: 13.5px;
    line-height: 1.7;
}

/* ===== 真实能力与信任证据 ===== */
.trust-proof {
    background: #fff;
}

.trust-proof-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.trust-proof-card {
    background: var(--color-bg-gray);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 26px 24px;
    transition: var(--transition);
}

.trust-proof-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(245, 158, 11, 0.25);
}

.trust-proof-card .proof-label {
    display: inline-block;
    margin-bottom: 14px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-accent-dark);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
}

.trust-proof-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.trust-proof-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.75;
}

/* ===== 产品中心 ===== */
.products {
    background: var(--color-bg-gray);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.product-card.featured {
    border: 2px solid rgba(237, 137, 54, 0.2);
}

.product-card.featured:hover {
    border-color: var(--color-accent);
}

.product-img {
    height: 220px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background: #eef2f7;
}

.product-img img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    z-index: 0;
}

.product-card:hover .product-img img {
    transform: scale(1.06);
}

.product-img-neutral {
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(135deg, rgba(30, 58, 95, 0.9), rgba(15, 39, 68, 0.96)),
        repeating-linear-gradient(45deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 16px);
}

.product-img-neutral::before {
    content: attr(data-title);
    position: relative;
    z-index: 1;
    padding: 10px 18px;
    border: 1px solid rgba(255,255,255,0.24);
    border-radius: 999px;
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 1px;
    background: rgba(255,255,255,0.08);
}

.product-img::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.15) 100%);
    pointer-events: none;
}

.badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--color-accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 20px;
    z-index: 2;
    letter-spacing: 1px;
    box-shadow: 0 2px 8px rgba(237, 137, 54, 0.4);
}

.product-hover-mask {
    position: absolute;
    inset: 0;
    background: rgba(26, 54, 93, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 3;
}

.product-card:hover .product-hover-mask {
    opacity: 1;
}

.product-hover-btn {
    padding: 12px 28px;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-button);
    font-weight: 600;
    font-size: 14px;
    transform: translateY(10px);
    transition: var(--transition);
}

.product-card:hover .product-hover-btn {
    transform: translateY(0);
}

.product-hover-btn:hover {
    background: var(--color-accent-dark);
    color: #fff;
}

.product-body {
    padding: 22px 24px 26px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-body h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--color-primary-dark);
}

.product-body p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.product-specs {
    display: grid;
    gap: 6px;
    margin: 0 0 16px;
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.product-specs span {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.5;
}

.product-specs strong {
    color: var(--color-primary-dark);
    font-weight: 700;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 18px;
}

.product-tags span {
    display: inline-block;
    padding: 4px 10px;
    background: var(--color-bg-gray);
    color: var(--color-text-light);
    font-size: 12px;
    border-radius: 4px;
    font-weight: 500;
}

.product-card.featured .product-tags span {
    background: rgba(237, 137, 54, 0.08);
    color: var(--color-accent-dark);
}

.product-link {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding-top: 8px;
    border-top: 1px solid var(--color-border);
}

.product-link .arrow {
    transition: var(--transition);
    display: inline-block;
}

.product-link:hover {
    color: var(--color-accent);
}

.product-link:hover .arrow {
    transform: translateX(4px);
}

/* ===== 应用领域 ===== */
.applications {
    background: linear-gradient(135deg, #0f2744 0%, #1e3a5f 50%, #0f2744 100%);
    color: #fff;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.applications::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
}

.applications::after {
    content: "";
    position: absolute;
    top: 30px;
    right: 30px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--color-accent-glow), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.applications .section-head {
    margin-bottom: 48px;
}

.applications .section-tag {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.applications .section-title {
    font-size: 42px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -1px;
}

.applications .section-title .accent-light {
    background: linear-gradient(135deg, var(--color-accent), #FF8C00, var(--color-accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
    font-weight: 800;
    letter-spacing: 2px;
}

.applications .section-title .accent-light::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), #FF8C00);
    border-radius: 2px;
}

.applications .section-subtitle {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.app-card {
    position: relative;
    height: 380px;
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: var(--transition);
    display: block;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    background: #1e3a5f;
}

.app-card > img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 0;
    transition: transform 0.5s ease;
}

.app-card:hover > img {
    transform: scale(1.06);
}

.app-card-neutral {
    background:
        radial-gradient(circle at 20% 18%, rgba(245, 158, 11, 0.18), transparent 34%),
        linear-gradient(135deg, #17395f 0%, #0f2744 100%);
}

.app-card-neutral::after {
    content: attr(data-title);
    position: absolute;
    top: 26px;
    right: 26px;
    z-index: 1;
    color: rgba(255,255,255,0.18);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
}

.app-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 39, 68, 0.3) 0%, rgba(15, 39, 68, 0.9) 70%, rgba(15, 39, 68, 0.95) 100%);
    z-index: 1;
}

.app-card:hover::before {
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.2) 0%, rgba(15, 39, 68, 0.85) 60%, rgba(15, 39, 68, 0.92) 100%);
}

.app-card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 28px;
    z-index: 2;
}

.app-icon {
    font-size: 0;
    margin-bottom: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
}

.app-icon::before,
.app-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.app-grid .app-card:nth-child(1) .app-icon::before {
    width: 22px;
    height: 28px;
    border: 2px solid #fff;
    border-radius: 5px;
}

.app-grid .app-card:nth-child(1) .app-icon::after {
    width: 10px;
    height: 2px;
    background: var(--color-accent-light);
    box-shadow: 0 -8px 0 var(--color-accent-light), 0 8px 0 var(--color-accent-light);
}

.app-grid .app-card:nth-child(2) .app-icon::before {
    width: 28px;
    height: 20px;
    border: 2px solid #fff;
    border-top: 0;
}

.app-grid .app-card:nth-child(2) .app-icon::after {
    width: 24px;
    height: 24px;
    border-top: 2px solid #fff;
    border-left: 2px solid #fff;
    transform: translate(-50%, -65%) rotate(45deg);
}

.app-grid .app-card:nth-child(3) .app-icon::before {
    width: 26px;
    height: 26px;
    border: 2px solid #fff;
    border-radius: 50%;
}

.app-grid .app-card:nth-child(3) .app-icon::after {
    width: 6px;
    height: 6px;
    background: var(--color-accent-light);
    border-radius: 50%;
    box-shadow: 13px 0 0 var(--color-accent-light), -13px 0 0 var(--color-accent-light), 0 13px 0 var(--color-accent-light), 0 -13px 0 var(--color-accent-light);
}

.app-grid .app-card:nth-child(4) .app-icon::before {
    width: 24px;
    height: 28px;
    border: 2px solid #fff;
    border-radius: 4px;
}

.app-grid .app-card:nth-child(4) .app-icon::after {
    width: 14px;
    height: 2px;
    background: var(--color-accent-light);
    box-shadow: 0 -7px 0 var(--color-accent-light), 0 7px 0 var(--color-accent-light);
}

.app-grid .app-card:nth-child(5) .app-icon::before {
    width: 28px;
    height: 18px;
    border: 2px solid #fff;
    border-radius: 10px;
}

.app-grid .app-card:nth-child(5) .app-icon::after {
    width: 2px;
    height: 22px;
    background: var(--color-accent-light);
    box-shadow: 8px 0 0 var(--color-accent-light), -8px 0 0 var(--color-accent-light);
}

.app-grid .app-card:nth-child(6) .app-icon::before {
    width: 26px;
    height: 26px;
    border: 2px solid #fff;
    border-radius: 8px;
    transform: translate(-50%, -50%) rotate(45deg);
}

.app-grid .app-card:nth-child(6) .app-icon::after {
    width: 12px;
    height: 12px;
    border: 2px solid var(--color-accent-light);
    border-radius: 50%;
}

.app-card:hover .app-icon {
    background: rgba(255, 255, 255, 0.25);
}

.app-card-content h3 {
    color: #fff;
    font-size: 22px;
    margin-bottom: 8px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.app-card-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 1.6;
}

/* 应用领域卡片按钮 */
.app-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-accent-light);
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.app-card:hover .app-btn {
    gap: 10px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* ===== 关于三奕 ===== */
.about {
    background: var(--color-bg);
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-lg);
}

.about-image-accent {
    position: absolute;
    bottom: 30px;
    right: -20px;
    background: var(--color-accent);
    color: #fff;
    padding: 24px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 14px;
}

.accent-number {
    font-size: 52px;
    font-weight: 800;
    line-height: 1;
}

.accent-text {
    font-size: 14px;
    line-height: 1.5;
    font-weight: 500;
}

.about-content .section-tag {
    text-align: left;
    display: inline-block;
    margin-bottom: 16px;
}

.about-content .section-title {
    font-size: 34px;
    text-align: left;
    margin-bottom: 20px;
}

.about-lead {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 30px;
}

.about-points {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 34px;
}

.about-point {
    display: flex;
    gap: 14px;
    padding: 14px 16px;
    background: var(--color-bg-gray);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.about-point:hover {
    background: rgba(237, 137, 54, 0.08);
    transform: translateY(-1px);
}

.about-point-icon {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: rgba(30, 58, 95, 0.08);
    color: var(--color-primary);
    font-size: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
}

.about-point-icon::before,
.about-point-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.about-point:nth-child(1) .about-point-icon::before {
    width: 18px;
    height: 14px;
    border: 2px solid var(--color-primary);
    border-radius: 3px;
}

.about-point:nth-child(1) .about-point-icon::after {
    width: 10px;
    height: 6px;
    border: 2px solid var(--color-primary);
    border-bottom: 0;
    border-radius: 6px 6px 0 0;
    transform: translate(-50%, -120%);
}

.about-point:nth-child(2) .about-point-icon::before {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
}

.about-point:nth-child(2) .about-point-icon::after {
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    box-shadow: 0 -6px 0 -1px rgba(30,58,95,0.35), 0 6px 0 -1px rgba(30,58,95,0.35);
}

.about-point:nth-child(3) .about-point-icon::before {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-primary);
    border-radius: 4px;
}

.about-point:nth-child(3) .about-point-icon::after {
    width: 18px;
    height: 2px;
    background: var(--color-primary);
    box-shadow: 0 -6px 0 rgba(30,58,95,0.35), 0 6px 0 rgba(30,58,95,0.35);
}

.about-point:nth-child(4) .about-point-icon::before {
    width: 18px;
    height: 22px;
    border: 2px solid var(--color-primary);
    border-radius: 10px 10px 4px 4px;
}

.about-point:nth-child(4) .about-point-icon::after {
    width: 10px;
    height: 2px;
    background: var(--color-primary);
    box-shadow: 0 -5px 0 var(--color-primary), 0 5px 0 var(--color-primary);
}

.about-point h4 {
    font-size: 15px;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.about-point p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
}

.about-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== 核心优势 ===== */
.advantages {
    background: var(--color-bg-gray);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-item {
    background: #fff;
    padding: 40px 32px;
    border-radius: var(--radius-card);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 0;
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.advantage-item:hover::before {
    opacity: 1;
}

.adv-icon {
    font-size: 0;
    margin-bottom: 20px;
    display: inline-block;
    padding: 16px;
    background: linear-gradient(135deg, rgba(237, 137, 54, 0.12), rgba(26, 54, 93, 0.08));
    border-radius: 12px;
    width: 72px;
    height: 72px;
    line-height: 40px;
    text-align: center;
    position: relative;
}

.adv-icon::before,
.adv-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.advantage-item:nth-child(1) .adv-icon::before {
    width: 30px;
    height: 22px;
    border: 2px solid var(--color-primary);
    border-top: 0;
}

.advantage-item:nth-child(1) .adv-icon::after {
    width: 28px;
    height: 12px;
    border-left: 2px solid var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    transform: translate(-52%, -96%) skewY(-24deg);
}

.advantage-item:nth-child(2) .adv-icon::before {
    width: 16px;
    height: 30px;
    border: 2px solid var(--color-primary);
    border-radius: 10px 10px 5px 5px;
}

.advantage-item:nth-child(2) .adv-icon::after {
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    box-shadow: 0 7px 0 var(--color-accent);
}

.advantage-item:nth-child(3) .adv-icon::before {
    width: 24px;
    height: 28px;
    border: 2px solid var(--color-primary);
    border-radius: 4px;
}

.advantage-item:nth-child(3) .adv-icon::after {
    width: 12px;
    height: 7px;
    border-left: 2px solid var(--color-accent);
    border-bottom: 2px solid var(--color-accent);
    transform: translate(-50%, -30%) rotate(-45deg);
}

.advantage-item:nth-child(4) .adv-icon::before {
    width: 28px;
    height: 28px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
}

.advantage-item:nth-child(4) .adv-icon::after {
    width: 2px;
    height: 22px;
    background: var(--color-accent);
    transform: translate(-50%, -50%) rotate(45deg);
}

.advantage-item:nth-child(5) .adv-icon::before {
    width: 28px;
    height: 16px;
    border: 2px solid var(--color-primary);
    border-radius: 12px;
}

.advantage-item:nth-child(5) .adv-icon::after {
    width: 16px;
    height: 2px;
    background: var(--color-accent);
    box-shadow: -8px -7px 0 -1px var(--color-accent), -8px 7px 0 -1px var(--color-accent);
}

.advantage-item:nth-child(6) .adv-icon::before {
    width: 30px;
    height: 20px;
    border: 2px solid var(--color-primary);
    border-radius: 4px;
}

.advantage-item:nth-child(6) .adv-icon::after {
    width: 9px;
    height: 9px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    box-shadow: 15px 0 0 -1px var(--color-accent);
    transform: translate(-85%, -50%);
}

.advantage-item h3 {
    font-size: 20px;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
}

.advantage-item p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ===== 联系我们 CTA ===== */
.cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta::before,
.cta::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.cta::before {
    top: -80px;
    left: -80px;
    width: 300px;
    height: 300px;
    background: var(--color-accent);
}

.cta::after {
    bottom: -120px;
    right: -80px;
    width: 380px;
    height: 380px;
    background: #fff;
}

.cta-content {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.cta-text .section-tag {
    background: rgba(255, 255, 255, 0.15);
    color: var(--color-accent-light);
    text-align: left;
    display: inline-block;
    margin-bottom: 16px;
}

.cta-text h2 {
    font-size: 38px;
    color: #fff;
    margin-bottom: 20px;
    line-height: 1.3;
}

.cta-text p {
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 24px;
    opacity: 0.9;
}

.cta-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 32px;
}

.cta-list div {
    font-size: 14px;
    padding: 6px 0;
    opacity: 0.95;
}

.cta-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 联系卡片 */
.contact-card {
    background: #fff;
    color: var(--color-text);
    border-radius: var(--radius-card);
    padding: 32px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.contact-card-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-bottom: 22px;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 20px;
}

.contact-logo {
    padding: 12px;
    background: linear-gradient(135deg, rgba(237, 137, 54, 0.15), rgba(26, 54, 93, 0.08));
    border-radius: 14px;
    width: 48px;
    height: 48px;
    position: relative;
    flex-shrink: 0;
    font-size: 0;
}

.contact-logo::before {
    content: "";
    position: absolute;
    inset: 12px;
    border: 2px solid var(--color-primary);
    border-radius: 7px;
}

.contact-logo::after {
    content: "";
    position: absolute;
    left: 18px;
    top: 18px;
    width: 12px;
    height: 12px;
    border-left: 2px solid var(--color-accent);
    border-bottom: 2px solid var(--color-accent);
}

.contact-card-head h3 {
    font-size: 17px;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.contact-card-head p {
    font-size: 12px;
    color: var(--color-text-lighter);
    letter-spacing: 2px;
}

.contact-card-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 4px;
    border-bottom: 1px dashed var(--color-border);
    gap: 16px;
}

.contact-row:last-child {
    border-bottom: none;
}

.contact-label {
    font-size: 13px;
    color: var(--color-text-light);
    font-weight: 500;
}

.contact-value {
    font-size: 14px;
    color: var(--color-primary-dark);
    font-weight: 600;
    text-align: right;
}

/* ===== 底部 Footer ===== */
.footer {
    background: #0f2744;
    color: rgba(255, 255, 255, 0.75);
    padding: 64px 0 0;
}

.footer-grid,
.footer-content {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 50px;
    padding-bottom: 48px;
}

.footer-col .footer-logo,
.footer-info .footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 20px;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col .footer-logo img,
.footer-info .footer-logo img {
    height: 40px;
    width: auto;
    filter: brightness(1.1);
}

.footer-col p,
.footer-info p,
.footer-1688 p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
}

.footer-col h4,
.footer-links h4,
.footer-1688 h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: 1px;
}

.footer-col ul,
.footer-links ul,
.footer-1688 ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col ul li,
.footer-links ul li,
.footer-1688 ul li {
    margin-bottom: 12px;
}

.footer-col a,
.footer-links a,
.footer-1688 a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-col a:hover,
.footer-links a:hover,
.footer-1688 a:hover {
    color: var(--color-accent-light);
    transform: translateX(4px);
}

.footer-col ul li,
.footer-links ul li,
.footer-1688 ul li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-socials {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.footer-socials .social {
    width: auto;
    height: 38px;
    padding: 0 12px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.footer-socials .social:hover {
    background: var(--color-accent);
    transform: translateY(-3px);
}

.footer-logo span small {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 400;
    letter-spacing: 2px;
    margin-left: 4px;
}

.btn-1688-large {
    display: inline-flex;
    background: var(--color-accent);
    color: #fff;
    padding: 12px 24px;
    font-size: 14px;
    margin-top: 14px;
    margin-bottom: 10px;
    text-decoration: none;
    border-radius: var(--radius-button);
    transition: all 0.3s ease;
}

.btn-1688-large:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
}

.footer-store-link {
    display: inline-block;
    margin-top: 2px;
    color: var(--color-accent-light) !important;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.footer-note {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

.footer-bottom {
    text-align: center;
    padding: 22px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
}

.footer-bottom p {
    margin: 0;
}

/* ===== 报价弹窗 Modal ===== */
.quote-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 39, 68, 0.75);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
    padding: 16px;
    overflow-y: auto;
}

.quote-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.quote-modal {
    background: #fff;
    border-radius: 20px;
    width: 90%;
    max-width: 480px;
    overflow: hidden auto;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
    transform: translateY(30px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    max-height: calc(100vh - 32px);
}

.quote-modal-overlay.active .quote-modal {
    transform: translateY(0) scale(1);
}

.quote-modal-header {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: #fff;
    padding: 32px 32px 28px;
    text-align: center;
    position: relative;
}

.quote-modal-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 2px;
}

.quote-modal-icon {
    display: inline-flex;
    margin-bottom: 12px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.14);
    position: relative;
    font-size: 0;
}

.quote-modal-icon::before {
    content: "";
    position: absolute;
    width: 22px;
    height: 26px;
    left: 13px;
    top: 11px;
    border: 2px solid #fff;
    border-radius: 4px;
}

.quote-modal-icon::after {
    content: "";
    position: absolute;
    width: 12px;
    height: 2px;
    left: 18px;
    top: 21px;
    background: var(--color-accent-light);
    box-shadow: 0 7px 0 var(--color-accent-light);
}

.quote-modal-header h3 {
    color: #fff;
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.quote-modal-header p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    margin: 0;
}

.quote-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #fff;
    font-size: 18px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    line-height: 1;
}

.quote-modal-close:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: rotate(90deg);
}

.quote-modal-body {
    padding: 32px;
}

.quote-modal-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.quote-info-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px;
    background: var(--color-bg-gray);
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.quote-info-item:hover {
    background: #fff;
    border-color: rgba(245, 158, 11, 0.25);
    box-shadow: 0 4px 16px rgba(30, 58, 95, 0.06);
}

.quote-info-icon {
    font-size: 13px;
    font-weight: 800;
    color: var(--color-primary);
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(30, 58, 95, 0.08));
    border-radius: 12px;
}

.quote-info-text {
    flex: 1;
}

.quote-info-label {
    font-size: 12px;
    color: var(--color-text-lighter);
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.quote-info-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.4;
}

.quote-info-value a {
    color: var(--color-primary-dark);
    text-decoration: none;
    transition: color 0.3s ease;
}

.quote-info-value a:hover {
    color: var(--color-accent);
}

.quote-modal-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
}

.quote-modal-actions .btn-primary {
    flex: 1;
    text-align: center;
    padding: 14px 20px;
    font-size: 15px;
}

.quote-modal-actions .btn-outline {
    flex: 1;
    text-align: center;
    padding: 14px 20px;
    font-size: 15px;
}

.quote-modal-footer-note {
    text-align: center;
    margin-top: 16px;
    font-size: 12px;
    color: var(--color-text-lighter);
}

/* ===== 悬浮元素 ===== */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 80px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    z-index: 900;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-accent);
    transform: translateY(-4px);
}

.chat-widget {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    z-index: 900;
    box-shadow: 0 6px 24px rgba(237, 137, 54, 0.5);
    transition: var(--transition);
}

.chat-widget:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(237, 137, 54, 0.45);
}

/* ===== 滚动出现动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式布局 ===== */
@media (max-width: 1024px) {
    .header-store {
        min-height: 58px;
        padding: 11px 18px;
        font-size: 16px;
    }
    .catalog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .products-store-card {
        grid-template-columns: 1fr;
    }
    .products-store-actions {
        justify-content: flex-start;
    }
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .product-item {
        grid-template-columns: 1fr !important;
    }
    .product-item:nth-child(even) .product-image {
        order: 0;
    }
    .product-image {
        min-height: 280px;
    }
    .product-info {
        padding: 36px 32px;
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    .about-wrapper {
        grid-template-columns: 1fr;
    }
    .cta-content {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    section {
        padding: 50px 0;
    }
    .section-title {
        font-size: 28px;
    }
    .header-welcome-bar,
    .header-slogan,
    .header-phone .phone-text small {
        display: none;
    }
    .header-top {
        padding: 8px 0;
    }
    .header-top-container {
        gap: 12px;
        min-width: 0;
        justify-content: space-between;
    }
    .header-logo {
        min-width: 0;
        flex: 1 1 auto;
    }
    .header-logo img {
        height: 44px;
    }
    .header-logo-text strong {
        font-size: 18px;
        white-space: nowrap;
    }
    .header-phone {
        flex: 0 0 auto;
        min-width: 44px;
        padding: 10px;
    }
    .header-store {
        min-height: 42px;
        padding: 10px 12px;
        font-size: 14px;
    }
    .header-phone .phone-icon {
        display: none;
    }
    .header-phone .phone-text strong {
        font-size: 0;
    }
    .header-phone .phone-text strong::after {
        content: "电话";
        font-size: 14px;
    }
    .mobile-menu-btn {
        display: block;
        flex: 0 0 42px;
        width: 42px;
        height: 42px;
        border: 1px solid var(--color-border);
        border-radius: 8px;
        background: #fff;
        color: var(--color-primary-dark);
        font-size: 24px;
        line-height: 1;
        cursor: pointer;
    }
    .header-nav {
        display: none;
    }
    .header-nav.mobile-open {
        display: block;
        max-height: calc(100vh - 65px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .header-nav.mobile-open .header-nav-container {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }
    .header-nav.mobile-open .nav-link {
        color: var(--color-primary-dark);
        padding: 14px 16px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .header-nav.mobile-open .nav-item-dropdown .nav-link::after {
        content: '▾';
        font-size: 12px;
        transition: transform 0.2s ease;
        margin-left: 8px;
    }
    .header-nav.mobile-open .nav-item-dropdown.dropdown-open .nav-link::after {
        transform: rotate(180deg);
    }
    .header-nav.mobile-open .nav-dropdown-menu {
        position: static;
        opacity: 0;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        transform: none;
        box-shadow: none;
        padding: 0;
        min-width: 0;
        width: 100%;
        border-top: 0;
        transition: all 0.3s ease;
    }
    .header-nav.mobile-open .nav-item-dropdown.dropdown-open .nav-dropdown-menu {
        opacity: 1;
        visibility: visible;
        max-height: 1000px;
        padding: 12px 0 0;
    }
    .header-nav.mobile-open .nav-dropdown-grid {
        grid-template-columns: 1fr;
    }
    .banner {
        margin-top: 65px;
        height: 480px;
    }
    .page-banner,
    .apps-hero,
    .about-hero,
    .contact-hero {
        margin-top: 65px !important;
    }
    .page-banner-content,
    .apps-hero-content,
    .about-hero-content,
    .contact-hero-content,
    .banner-content {
        max-width: 100%;
        overflow-wrap: break-word;
    }
    .banner-content h1,
    .banner-content h2 {
        font-size: 32px;
    }
    .product-grid {
        grid-template-columns: 1fr;
    }
    .products-store-cta {
        padding: 28px 0 20px;
    }
    .products-store-card {
        padding: 22px;
    }
    .products-store-card h2 {
        font-size: 24px;
    }
    .products-store-actions,
    .catalog-actions {
        flex-direction: column;
    }
    .catalog-grid {
        grid-template-columns: 1fr;
    }
    .catalog-card {
        grid-template-rows: 170px 1fr;
    }
    .trust-proof-grid {
        grid-template-columns: 1fr;
    }
    .products-categories,
    .app-detail-section,
    #contact,
    #contactForm {
        scroll-margin-top: 90px;
    }
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    .app-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .app-card {
        border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
    .about-points {
        grid-template-columns: 1fr;
    }
    .cta-list {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .banner-arrow {
        display: none;
    }
    .product-body p,
    .app-card-content p,
    .advantage-item p,
    .trust-proof-card p {
        font-size: 15px;
    }
    .product-tags span,
    .product-specs span {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }
    section {
        padding: 40px 0;
    }
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    .section-title {
        font-size: 24px;
    }
    .section-subtitle {
        font-size: 14px;
    }

    /* 头部优化 */
    .header-top-container {
        gap: 8px;
    }
    .header-logo {
        gap: 8px;
    }
    .header-logo-text strong {
        font-size: 16px;
    }
    .header-logo-text small {
        font-size: 9px;
        letter-spacing: 2px;
    }
    .header-logo img {
        height: 38px;
        width: auto;
    }
    .header-store {
        padding: 8px 12px;
        font-size: 13px;
        min-height: 38px;
        border-radius: 8px;
    }
    .header-phone {
        padding: 8px 10px;
        min-width: 38px;
        border-radius: 8px;
    }
    .header-phone .phone-text strong::after {
        font-size: 13px;
    }
    .mobile-menu-btn {
        width: 38px;
        height: 38px;
        flex: 0 0 38px;
        font-size: 20px;
        border-radius: 8px;
    }
    .header-top {
        padding: 6px 0;
    }

    /* Banner优化 */
    .banner {
        height: 500px;
        margin-top: 56px;
    }
    .page-banner,
    .apps-hero,
    .about-hero,
    .contact-hero {
        margin-top: 56px !important;
    }
    .banner-content {
        padding-bottom: 40px;
    }
    .banner-content h1,
    .banner-content h2,
    .page-banner-content h1 {
        font-size: 26px !important;
        line-height: 1.3;
    }
    .banner-content p,
    .banner-desc,
    .page-banner-content p {
        font-size: 14px !important;
        margin-bottom: 20px;
    }
    .banner-features {
        gap: 8px;
        margin-bottom: 24px;
        justify-content: flex-start;
    }
    .banner-features span {
        padding: 8px 14px;
        font-size: 13px;
    }
    .banner-btns {
        flex-direction: column;
        gap: 10px;
    }
    .banner-btns .btn-primary,
    .banner-btns .btn-secondary,
    .banner-btns a {
        width: 100%;
        justify-content: center;
        padding: 12px 24px;
        font-size: 15px;
    }
    .banner-dots {
        bottom: 12px;
    }
    .banner-dot {
        width: 28px;
        height: 3px;
    }

    /* 产品卡片 */
    .product-image {
        min-height: 220px;
    }
    .product-info {
        padding: 24px 20px;
    }
    .product-info h3 {
        font-size: 20px;
    }
    .catalog-card {
        grid-template-rows: 160px 1fr;
    }
    .catalog-body {
        padding: 18px;
    }
    .catalog-body h3 {
        font-size: 17px;
    }
    .catalog-actions .btn-outline,
    .products-store-actions a {
        width: 100%;
        justify-content: center;
    }
    .products-store-card {
        padding: 18px;
    }
    .products-store-card h2 {
        font-size: 20px;
    }

    /* 浮动按钮 */
    .back-to-top {
        right: 16px;
        bottom: 82px;
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    .chat-widget {
        right: 16px;
        bottom: 16px;
        width: 52px;
        height: 52px;
        font-size: 12px;
    }

    /* 报价弹窗 */
    .quote-modal {
        width: 95%;
        max-height: calc(100vh - 24px);
    }
    .quote-modal-header {
        padding: 24px 20px 20px;
    }
    .quote-modal-header h3 {
        font-size: 20px;
    }
    .quote-modal-body {
        padding: 20px;
    }
    .quote-modal-actions {
        flex-direction: column;
        gap: 10px;
    }
    .quote-modal-actions a {
        width: 100%;
        justify-content: center;
    }
    .quote-info-item {
        gap: 12px;
    }
    .quote-info-text .quote-info-value {
        font-size: 14px;
    }

    /* 统计数字 */
    .stat-number {
        font-size: 32px;
    }
    .stat-label {
        font-size: 13px;
    }

    /* 关于我们、CTA等卡片 */
    .trust-proof-card,
    .advantage-item,
    .about-point,
    .cta-item {
        padding: 20px;
    }

    /* Footer */
    .footer-content {
        gap: 28px;
    }
    .footer-info p {
        font-size: 14px;
    }
    .footer-links h4 {
        font-size: 15px;
    }
    .footer-links a {
        font-size: 14px;
    }
    .footer-bottom p {
        font-size: 12px;
    }

    /* About页面Lightbox */
    .lightbox-close {
        top: -44px;
        right: 0;
        width: 36px;
        height: 36px;
        font-size: 20px;
        line-height: 36px;
    }
}

/* ===== 产品图片弹窗画廊（居中模态框） ===== */
.gallery-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    backdrop-filter: blur(4px);
    padding: 24px;
}

.gallery-overlay.active {
    opacity: 1;
    visibility: visible;
}

.gallery-modal {
    position: relative;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 700px;
    width: 100%;
    overflow: hidden;
    transform: scale(0.92);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-overlay.active .gallery-modal {
    transform: scale(1);
}

.gallery-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    background: rgba(0, 0, 0, 0.45);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    z-index: 10002;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: all 0.3s ease;
    font-family: inherit;
}

.gallery-close:hover {
    background: rgba(220, 38, 38, 0.85);
    transform: rotate(90deg);
}

.gallery-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    background: rgba(0, 0, 0, 0.4);
    border: none;
    color: #fff;
    font-size: 18px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10002;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    -webkit-tap-highlight-color: transparent;
    transition: background 0.3s ease;
}

.gallery-arrow:hover {
    background: var(--color-accent);
}

.gallery-arrow-prev {
    left: 10px;
}

.gallery-arrow-next {
    right: 10px;
}

.gallery-image-wrap {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f0f0;
    min-height: 300px;
    max-height: 55vh;
    overflow: hidden;
    -webkit-user-select: none;
    user-select: none;
}

.gallery-image-wrap img {
    width: 100%;
    height: 100%;
    max-height: 55vh;
    object-fit: contain;
}

.gallery-info {
    padding: 14px 24px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--color-text-light);
}

#galleryTitle {
    font-weight: 700;
    color: var(--color-primary-dark);
    font-size: 16px;
}

#galleryCounter {
    color: var(--color-text-lighter);
    font-size: 13px;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .gallery-overlay {
        padding: 16px;
    }
    .gallery-modal {
        border-radius: 12px;
        max-width: 100%;
    }
    .gallery-arrow {
        width: 36px;
        height: 36px;
        font-size: 15px;
    }
    .gallery-arrow-prev {
        left: 6px;
    }
    .gallery-arrow-next {
        right: 6px;
    }
    .gallery-image-wrap {
        min-height: 220px;
        max-height: 45vh;
    }
    .gallery-image-wrap img {
        max-height: 45vh;
    }
    .gallery-close {
        top: 10px;
        right: 10px;
        width: 32px;
        height: 32px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .gallery-overlay {
        padding: 8px;
    }
    .gallery-info {
        padding: 10px 12px;
        font-size: 13px;
        flex-direction: column;
        gap: 4px;
        text-align: center;
    }
    #galleryTitle {
        font-size: 14px;
    }
    #galleryCounter {
        font-size: 12px;
    }
}