/* ============================================================
   钻石国际app · Diamond Facet Design System
   视觉语言：钻石切面 · 几何光影 · 轻奢质感
   配色：暖白底 + 玫瑰金 + 淡紫灰
   禁止深色背景 · 完全原创风格
   ============================================================ */

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

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background: #F8F6F3;
    color: #2D2A26;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ============================================================
   设计令牌 (CSS 自定义属性)
   ============================================================ */
:root {
    /* 主色调 — 暖白基底 */
    --color-bg: #F8F6F3;
    --color-bg-alt: #F0EDE8;
    --color-bg-card: #FFFFFF;
    --color-bg-cream: #F5F0EB;

    /* 强调色 — 玫瑰金 + 淡紫灰 */
    --color-rosegold: #D4A373;
    --color-rosegold-light: #E8C9A8;
    --color-rosegold-dark: #B8895C;
    --color-lavender: #D5C4D6;
    --color-lavender-light: #E8DDE9;
    --color-lavender-dark: #B8A4BA;

    /* 点缀色 */
    --color-gold: #C9A96E;
    --color-champagne: #F0E0C8;
    --color-stone: #8B7E74;
    --color-charcoal: #2D2A26;

    /* 功能色 */
    --color-text: #2D2A26;
    --color-text-secondary: #6B6258;
    --color-text-light: #9B9389;
    --color-border: #E8E2DA;
    --color-border-light: #F0ECE6;
    --color-white: #FFFFFF;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(139, 126, 116, 0.08);
    --shadow-md: 0 8px 32px rgba(139, 126, 116, 0.12);
    --shadow-lg: 0 16px 48px rgba(139, 126, 116, 0.16);
    --shadow-rose: 0 8px 32px rgba(212, 163, 115, 0.2);

    /* 圆角 — 钻石切割灵感，少量锐角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-facet: 4px 16px 4px 16px;

    /* 排版 */
    --font-display: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-body: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;

    /* 钻石切面专用 */
    --facet-angle: 12deg;
    --facet-angle-neg: -12deg;
}

/* ============================================================
   核心布局
   ============================================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 96px 0;
    position: relative;
}

.section:nth-child(even) {
    background: #F0EDE8;
}

/* 钻石切面装饰线 — 每个section顶部的斜切装饰 */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--color-rosegold-light) 20%,
        var(--color-rosegold) 50%,
        var(--color-lavender) 80%,
        transparent 100%
    );
    opacity: 0.4;
}

.section:first-child::before {
    display: none;
}

/* ============================================================
   导航 — 钻石棱面玻璃态
   ============================================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(248, 246, 243, 0.88);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border-bottom: 1px solid rgba(212, 163, 115, 0.15);
    transition: all 0.3s ease;
}

.site-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 5%,
        var(--color-rosegold-light) 20%,
        var(--color-lavender) 50%,
        var(--color-rosegold-light) 80%,
        transparent 95%
    );
    opacity: 0.5;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--color-charcoal);
    letter-spacing: 0.5px;
    position: relative;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-facet);
    background: linear-gradient(135deg, var(--color-rosegold-light), var(--color-rosegold));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: 0 4px 12px rgba(212, 163, 115, 0.3);
    transform: rotate(45deg);
    transition: transform 0.4s ease;
}

.logo-icon span {
    transform: rotate(-45deg);
    display: inline-block;
}

.logo:hover .logo-icon {
    transform: rotate(90deg);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.3s ease;
    position: relative;
    padding: 4px 0;
    letter-spacing: 0.3px;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-rosegold), var(--color-lavender));
    border-radius: 2px;
    transition: transform 0.3s ease;
}

.main-nav a:hover {
    color: var(--color-charcoal);
}

.main-nav a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-cta {
    padding: 10px 24px;
    border-radius: var(--radius-facet) !important;
    background: linear-gradient(135deg, var(--color-rosegold), var(--color-rosegold-dark));
    color: #fff !important;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(212, 163, 115, 0.3);
    transition: all 0.3s ease !important;
    letter-spacing: 0.5px;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 24px rgba(212, 163, 115, 0.4);
    color: #fff !important;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: none;
    background: none;
    color: var(--color-charcoal);
    font-size: 1.4rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.menu-toggle:hover {
    background: rgba(212, 163, 115, 0.1);
}

/* ============================================================
   Hero — 钻石光耀
   ============================================================ */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(160deg, #F8F6F3 0%, #F0EDE8 40%, #F5F0EB 100%);
    overflow: hidden;
    padding-top: 72px;
}

/* 钻石光晕背景 */
.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 70%;
    height: 140%;
    background: radial-gradient(ellipse at 70% 50%, rgba(212, 163, 115, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at 30% 80%, rgba(213, 196, 214, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 2;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 18px 6px 14px;
    border-radius: 50px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(212, 163, 115, 0.12), rgba(213, 196, 214, 0.12));
    border: 1px solid rgba(212, 163, 115, 0.2);
    color: var(--color-rosegold-dark);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-eyebrow::before {
    content: '◆';
    font-size: 0.6rem;
    color: var(--color-rosegold);
}

.hero h1 {
    font-size: 3.4rem;
    line-height: 1.15;
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-charcoal);
}

.hero h1 .text-accent {
    background: linear-gradient(135deg, var(--color-rosegold), var(--color-rosegold-dark), var(--color-lavender-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 540px;
    margin-bottom: 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    z-index: 2;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
    transition: transform 0.6s ease;
}

.hero-image:hover {
    transform: perspective(1000px) rotateY(-2deg) rotateX(1deg);
}

.hero-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(212, 163, 115, 0.1), transparent 50%);
    z-index: 1;
    pointer-events: none;
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 钻石菱形装饰网格 */
.hero-deco-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.hero-deco-grid::before {
    content: '';
    position: absolute;
    top: 10%;
    right: 5%;
    width: 300px;
    height: 300px;
    background: repeating-linear-gradient(45deg,
        transparent,
        transparent 20px,
        rgba(212, 163, 115, 0.04) 20px,
        rgba(212, 163, 115, 0.04) 21px
    );
    border-radius: 50%;
    opacity: 0.6;
}

.hero-deco-grid::after {
    content: '';
    position: absolute;
    bottom: 15%;
    left: 60%;
    width: 200px;
    height: 200px;
    background: repeating-linear-gradient(-45deg,
        transparent,
        transparent 15px,
        rgba(213, 196, 214, 0.05) 15px,
        rgba(213, 196, 214, 0.05) 16px
    );
    border-radius: 50%;
}

/* ============================================================
   按钮 — 钻石切割风格
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-facet);
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-rosegold), var(--color-rosegold-dark));
    color: #fff;
    box-shadow: 0 4px 20px rgba(212, 163, 115, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 32px rgba(212, 163, 115, 0.45);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--color-rosegold);
    color: var(--color-rosegold-dark);
}

.btn-outline:hover {
    background: rgba(212, 163, 115, 0.06);
    border-color: var(--color-rosegold-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(212, 163, 115, 0.15);
}

/* ============================================================
   标签/标题 — 钻石棱光
   ============================================================ */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 14px;
    color: var(--color-rosegold-dark);
    text-transform: uppercase;
}

.section-label::before {
    content: '◇';
    font-size: 0.6rem;
    color: var(--color-rosegold);
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-charcoal);
    line-height: 1.2;
}

.section-title .text-accent {
    background: linear-gradient(135deg, var(--color-rosegold), var(--color-lavender-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    max-width: 600px;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
    line-height: 1.7;
    font-size: 1.05rem;
}

/* ============================================================
   卡片网格 — 钻石切面卡片
   ============================================================ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.category-card {
    border-radius: var(--radius-md);
    padding: 32px 28px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-rosegold-light), var(--color-rosegold), var(--color-lavender));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(212, 163, 115, 0.2);
}

.category-card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-facet);
    background: linear-gradient(135deg, var(--color-champagne), var(--color-rosegold-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.4rem;
    color: var(--color-rosegold-dark);
    transition: all 0.3s ease;
}

.category-card:hover .card-icon {
    transform: rotate(45deg) scale(1.05);
    box-shadow: 0 4px 16px rgba(212, 163, 115, 0.25);
}

.category-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-charcoal);
}

.category-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 18px;
}

.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--color-rosegold-dark);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.card-link::after {
    content: '→';
    transition: transform 0.3s ease;
}

.card-link:hover {
    gap: 12px;
    color: var(--color-rosegold);
}

/* ============================================================
   特性块 — 钻石双面切割
   ============================================================ */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.feature-block:nth-child(even) .feature-image {
    order: 2;
}

.feature-block:nth-child(even) .feature-text {
    order: 1;
}

.feature-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
}

.feature-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(212, 163, 115, 0.08), transparent 50%);
    z-index: 1;
    pointer-events: none;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s ease;
}

.feature-image:hover img {
    transform: scale(1.03);
}

.feature-text h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-charcoal);
    line-height: 1.25;
}

.feature-text p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
    margin-top: 8px;
}

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.feature-list li::before {
    content: '◆';
    font-weight: 700;
    color: var(--color-rosegold);
    font-size: 0.65rem;
}

/* ============================================================
   数据条 — 钻石光芒数字
   ============================================================ */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 32px 20px;
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    position: relative;
    transition: all 0.3s ease;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 20%;
    right: 20%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-rosegold), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--color-charcoal);
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-charcoal), var(--color-stone));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 8px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ============================================================
   内容墙 — 钻石棱柱卡片
   ============================================================ */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.content-wall-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(212, 163, 115, 0.15);
}

.content-wall-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.content-wall-item:hover img {
    transform: scale(1.05);
}

.content-wall-body {
    padding: 24px 24px 28px;
}

.content-wall-body .meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-wall-body .meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.content-wall-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-charcoal);
    line-height: 1.3;
}

.content-wall-body p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================================================
   FAQ — 钻石问答
   ============================================================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: var(--color-bg-card);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(212, 163, 115, 0.25);
    box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
    padding: 18px 24px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-charcoal);
    font-size: 1rem;
    transition: color 0.3s ease;
}

.faq-item .faq-question::after {
    content: '◆';
    font-size: 0.65rem;
    color: var(--color-rosegold);
    transition: transform 0.4s ease;
    display: inline-block;
}

.faq-item.open .faq-question::after {
    transform: rotate(180deg);
}

.faq-item .faq-answer {
    padding: 0 24px 20px;
    display: none;
    color: var(--color-text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeSlideIn 0.4s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================
   CTA 横幅 — 玫瑰金辉光
   ============================================================ */
.cta-banner {
    padding: 72px 24px;
    text-align: center;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-rosegold), var(--color-rosegold-dark), var(--color-lavender-dark));
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.1) 0%, transparent 60%),
                radial-gradient(circle at 70% 60%, rgba(255,255,255,0.08) 0%, transparent 50%);
    pointer-events: none;
}

.cta-banner::after {
    content: '◆ ◆ ◆';
    position: absolute;
    bottom: 20px;
    right: 40px;
    font-size: 1.2rem;
    letter-spacing: 16px;
    color: rgba(255,255,255,0.1);
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255,255,255,0.85);
    max-width: 500px;
    margin: 0 auto 32px;
    font-size: 1.05rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary {
    background: #fff;
    color: var(--color-rosegold-dark);
    box-shadow: 0 4px 24px rgba(0,0,0,0.15);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

/* ============================================================
   页脚 — 钻石基座
   ============================================================ */
.site-footer {
    padding: 64px 0 28px;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.site-footer .container {
    position: relative;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-light);
    max-width: 300px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-col ul li a:hover {
    color: var(--color-rosegold-dark);
}

.footer-col ul li a::before {
    content: '◇';
    font-size: 0.5rem;
    color: var(--color-rosegold-light);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.footer-col ul li a:hover::before {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-light);
    letter-spacing: 0.5px;
}

.footer-bottom a {
    color: var(--color-rosegold-dark);
    text-decoration: none;
}

/* ============================================================
   工具类
   ============================================================ */
.text-accent {
    color: var(--color-rosegold-dark);
}

.text-center {
    text-align: center;
}

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

/* ============================================================
   钻石装饰元素 (通用)
   ============================================================ */
.diamond-deco {
    position: relative;
}

.diamond-deco::after {
    content: '◆';
    position: absolute;
    font-size: 0.5rem;
    color: var(--color-rosegold-light);
    opacity: 0.3;
}

/* 分割线 — 钻石切面风格 */
.divider-facet {
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--color-rosegold-light) 15%,
        var(--color-lavender) 50%,
        var(--color-rosegold-light) 85%,
        transparent 100%
    );
    margin: 48px 0;
    opacity: 0.5;
}

/* ============================================================
   响应式设计
   ============================================================ */

/* 平板 */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.8rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 32px;
    }

    .footer-grid > :first-child {
        grid-column: 1 / -1;
    }
}

/* 手机横屏 & 小平板 */
@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }

    .main-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(248, 246, 243, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px 28px;
        gap: 20px;
        border-bottom: 2px solid rgba(212, 163, 115, 0.1);
        box-shadow: 0 16px 48px rgba(0,0,0,0.08);
    }

    .main-nav.open a {
        font-size: 1.05rem;
        padding: 8px 0;
    }

    .main-nav.open .nav-cta {
        align-self: flex-start;
        margin-top: 8px;
    }

    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-image {
        margin-top: 40px;
        transform: none;
    }

    .hero-image:hover {
        transform: none;
    }

    .feature-block {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .feature-block:nth-child(even) .feature-image {
        order: 1;
    }

    .feature-block:nth-child(even) .feature-text {
        order: 2;
    }

    .feature-text h3 {
        font-size: 1.4rem;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .content-wall {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .cta-banner {
        padding: 48px 20px;
    }

    .cta-banner h2 {
        font-size: 1.6rem;
    }
}

/* 手机竖屏 */
@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .category-card {
        padding: 24px 20px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }

    .container {
        padding: 0 16px;
    }

    .section {
        padding: 48px 0;
    }

    .faq-item .faq-question {
        padding: 14px 18px;
        font-size: 0.95rem;
    }

    .faq-item .faq-answer {
        padding: 0 18px 16px;
    }

    .cta-banner h2 {
        font-size: 1.4rem;
    }

    .footer-brand p {
        max-width: 100%;
    }
}

/* ============================================================
   额外：钻石闪耀动画 (hover时微光)
   ============================================================ */
@keyframes shimmer {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

.shimmer-effect {
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255,255,255,0.1) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
}

/* 选中文本颜色 */
::selection {
    background: rgba(212, 163, 115, 0.25);
    color: var(--color-charcoal);
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-rosegold-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-rosegold);
}

/* ============================================================
   打印样式
   ============================================================ */
@media print {
    .site-header {
        position: relative;
        background: #fff;
        border: none;
    }

    .hero {
        min-height: auto;
        padding: 40px 0;
    }

    .btn,
    .nav-cta,
    .menu-toggle {
        display: none !important;
    }

    .section {
        padding: 40px 0;
        page-break-inside: avoid;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}