```css
/* =============================================
   yandex每日大赛 · 吃瓜网每日大赛 设计系统
   "日出竞赛" 主题 — 暖阳橙 × 翡翠绿 × 金
   ============================================= */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background: #FFFDF7;
    color: #1A1A2E;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(255, 107, 61, 0.2);
    color: #1A1A2E;
}

:root {
    --primary: #FF6B3D;
    --secondary: #0FA36B;
    --accent: #FFC53D;
    --bg: #FFFDF7;
    --bg-alt: #F2ECE4;
    --text: #1A1A2E;
    --text-subtle: rgba(26, 26, 46, 0.65);
    --radius: 16px;
    --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.05);
    --shadow-md: 0 8px 30px rgba(26, 26, 46, 0.07);
    --shadow-lg: 0 20px 60px rgba(26, 26, 46, 0.08);
    --shadow-primary: 0 8px 24px rgba(255, 107, 61, 0.28);
    --shadow-secondary: 0 8px 24px rgba(15, 163, 107, 0.2);
    --shadow-accent: 0 8px 24px rgba(255, 197, 61, 0.3);
}

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

.section {
    padding: 90px 0;
    position: relative;
}

.section:nth-child(even) {
    background: #F2ECE4;
}

/* =============================================
   导航 — 固定顶部，磨砂玻璃
   ============================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 253, 247, 0.9);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border-bottom: 1px solid rgba(26, 26, 46, 0.05);
    box-shadow: 0 1px 20px rgba(255, 107, 61, 0.03);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.3rem;
    text-decoration: none;
    color: var(--text);
    letter-spacing: -0.02em;
    transition: opacity 0.2s;
}

.logo:hover {
    opacity: 0.85;
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF6B3D, #FFC53D);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
    box-shadow: 0 4px 16px rgba(255, 107, 61, 0.35);
    position: relative;
    flex-shrink: 0;
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid rgba(255, 107, 61, 0.3);
    animation: pulseRing 2s ease-in-out infinite;
}

@keyframes pulseRing {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.12); opacity: 0.5; }
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 30px;
    list-style: none;
    margin: 0;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    transition: color 0.2s, opacity 0.2s;
    position: relative;
    padding: 4px 0;
    letter-spacing: 0.01em;
}

.main-nav a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, #FF6B3D, #FFC53D);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px;
}

.main-nav a:not(.nav-cta):hover::after {
    width: 100%;
}

.main-nav a:not(.nav-cta):hover {
    color: #FF6B3D;
}

.nav-cta {
    padding: 9px 24px;
    border-radius: 50px;
    color: #fff !important;
    font-weight: 600 !important;
    background: linear-gradient(135deg, #FF6B3D, #FF9F1C);
    box-shadow: 0 4px 16px rgba(255, 107, 61, 0.3);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s !important;
}

.nav-cta:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 24px rgba(255, 107, 61, 0.4) !important;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text);
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    background: rgba(255, 107, 61, 0.08);
}

.menu-toggle:hover {
    background: rgba(255, 107, 61, 0.15);
}

/* =============================================
   Hero — 日出感，温暖渐变
   ============================================= */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: 
        radial-gradient(ellipse 600px 400px at 82% 45%, rgba(255, 107, 61, 0.10), transparent 65%),
        radial-gradient(ellipse 500px 350px at 12% 80%, rgba(15, 163, 107, 0.06), transparent 60%),
        radial-gradient(ellipse 400px 300px at 50% 10%, rgba(255, 197, 61, 0.08), transparent 60%),
        linear-gradient(180deg, #FFFDF7 0%, #F7F0EA 100%);
    padding: 120px 0 90px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 480px;
    height: 480px;
    right: 6%;
    top: 50%;
    transform: translateY(-50%);
    background: radial-gradient(circle, rgba(255, 107, 61, 0.10) 0%, rgba(255, 197, 61, 0.04) 45%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    left: -60px;
    bottom: -60px;
    background: radial-gradient(circle, rgba(15, 163, 107, 0.08), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 720px;
    position: relative;
    z-index: 2;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 6px 20px;
    border-radius: 50px;
    margin-bottom: 24px;
    background: rgba(255, 107, 61, 0.12);
    color: #FF6B3D;
    border: 1px solid rgba(255, 107, 61, 0.2);
    backdrop-filter: blur(4px);
}

.hero-eyebrow::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #FF6B3D;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.7); }
}

.hero h1 {
    font-size: 3.4rem;
    line-height: 1.08;
    margin-bottom: 24px;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    text-shadow: 0 2px 20px rgba(255, 107, 61, 0.06);
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #FF6B3D, #FF9F1C);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-subtle);
    max-width: 560px;
    margin-bottom: 36px;
    line-height: 1.7;
}

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

.hero-buttons .btn {
    min-width: 150px;
    justify-content: center;
}

.hero-image {
    flex-shrink: 0;
    width: 320px;
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, #FF6B3D, #FFC53D);
    box-shadow: 0 24px 80px rgba(255, 107, 61, 0.25);
    transform: rotate(2deg);
    transition: transform 0.4s ease;
}

.hero-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(255, 107, 61, 0.3));
    pointer-events: none;
}

.hero-image:hover {
    transform: rotate(0deg) scale(1.01);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 4/5;
    object-fit: cover;
}

/* =============================================
   按钮
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s, background 0.25s;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
    pointer-events: none;
}

.btn:hover::after {
    width: 200px;
    height: 200px;
}

.btn-primary {
    background: linear-gradient(135deg, #FF6B3D, #FF9F1C);
    color: #fff;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(255, 107, 61, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--secondary);
    color: var(--secondary);
}

.btn-outline:hover {
    background: rgba(15, 163, 107, 0.08);
    border-color: #0FA36B;
    transform: translateY(-3px);
    box-shadow: var(--shadow-secondary);
}

/* =============================================
   标签 / 标题
   ============================================= */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 16px;
    color: #FF6B3D;
    background: rgba(255, 107, 61, 0.08);
    padding: 5px 16px;
    border-radius: 50px;
}

.section-label::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF6B3D, #FFC53D);
    box-shadow: 0 0 8px rgba(255, 107, 61, 0.4);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 56px;
    height: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, #FF6B3D, #FFC53D, #0FA36B);
    margin-top: 12px;
}

.section-desc {
    max-width: 600px;
    color: var(--text-subtle);
    margin-bottom: 44px;
    font-size: 1rem;
    line-height: 1.65;
}

/* =============================================
   卡片网格
   ============================================= */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 26px;
}

.category-card {
    border-radius: 20px;
    padding: 32px 28px;
    background: #fff;
    border: 1px solid rgba(26, 26, 46, 0.04);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #FF6B3D, #FFC53D);
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left;
    transition: opacity 0.3s, transform 0.3s;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(26, 26, 46, 0.1);
}

.category-card:hover::before {
    opacity: 1;
    transform: scaleX(1);
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.4rem;
    background: linear-gradient(135deg, rgba(255, 107, 61, 0.12), rgba(255, 197, 61, 0.12));
    color: #FF6B3D;
    transition: transform 0.3s;
}

.category-card:nth-child(2) .card-icon {
    background: linear-gradient(135deg, rgba(15, 163, 107, 0.12), rgba(15, 163, 107, 0.05));
    color: #0FA36B;
}

.category-card:nth-child(3) .card-icon {
    background: linear-gradient(135deg, rgba(255, 197, 61, 0.2), rgba(255, 107, 61, 0.08));
    color: #D48806;
}

.category-card:hover .card-icon {
    transform: scale(1.08) rotate(-6deg);
}

.category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.category-card p {
    font-size: 0.88rem;
    color: var(--text-subtle);
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: #FF6B3D;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.25s, color 0.25s;
}

.card-link::after {
    content: '→';
    font-size: 1rem;
    transition: transform 0.25s;
}

.card-link:hover {
    color: #FF9F1C;
    gap: 8px;
}

/* =============================================
   特性块 — 编辑风
   ============================================= */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.feature-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: transform 0.4s;
}

.feature-image:hover {
    transform: scale(1.01);
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.feature-text {
    padding: 20px 0;
}

.feature-text h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

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

.feature-list {
    list-style: none;
    margin-top: 12px;
}

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    border-bottom: 1px dashed rgba(26, 26, 46, 0.08);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '✦';
    font-weight: 700;
    font-size: 0.8rem;
    color: #0FA36B;
    background: rgba(15, 163, 107, 0.1);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.stat-item {
    padding: 36px 20px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid rgba(26, 26, 46, 0.05);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 0 0 20px 20px;
    background: linear-gradient(90deg, #FF6B3D, #FFC53D);
    opacity: 0;
    transition: opacity 0.3s;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(26, 26, 46, 0.08);
}

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

.stat-item:nth-child(2)::after {
    background: linear-gradient(90deg, #0FA36B, #6BCB77);
}

.stat-item:nth-child(3)::after {
    background: linear-gradient(90deg, #FFC53D, #FF9F1C);
}

.stat-item:nth-child(4)::after {
    background: linear-gradient(90deg, #6C5CE7, #A29BFE);
}

.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
    display: block;
}

.stat-item:nth-child(1) .stat-number { color: #FF6B3D; }
.stat-item:nth-child(2) .stat-number { color: #0FA36B; }
.stat-item:nth-child(3) .stat-number { color: #D48806; }
.stat-item:nth-child(4) .stat-number { color: #6C5CE7; }

.stat-label {
    font-size: 0.9rem;
    color: var(--text-subtle);
    margin-top: 8px;
    font-weight: 500;
    letter-spacing: 0.04em;
}

/* =============================================
   内容墙
   ============================================= */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 26px;
}

.content-wall-item {
    border-radius: 20px;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(26, 26, 46, 0.04);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s;
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.content-wall-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-wall-item:hover img {
    transform: scale(1.04);
}

.content-wall-body {
    padding: 22px 24px 28px;
}

.content-wall-body .card-label {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #0FA36B;
    background: rgba(15, 163, 107, 0.08);
    padding: 3px 10px;
    border-radius: 30px;
    margin-bottom: 10px;
}

.content-wall-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    line-height: 1.4;
}

.content-wall-body p {
    font-size: 0.86rem;
    color: var(--text-subtle);
    line-height: 1.55;
}

/* =============================================
   FAQ
   ============================================= */
.faq-list {
    max-width: 820px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid rgba(26, 26, 46, 0.06);
    border-radius: 16px;
    margin-bottom: 12px;
    overflow: hidden;
    background: #fff;
    cursor: pointer;
    transition: box-shadow 0.3s, border-color 0.3s;
    box-shadow: var(--shadow-sm);
}

.faq-item:hover {
    border-color: rgba(255, 107, 61, 0.2);
    box-shadow: 0 6px 20px rgba(255, 107, 61, 0.06);
}

.faq-item.open {
    border-color: rgba(255, 107, 61, 0.15);
    box-shadow: 0 8px 30px rgba(255, 107, 61, 0.08);
}

.faq-item .faq-question {
    padding: 18px 24px;
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    color: var(--text);
    transition: color 0.2s;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.6rem;
    font-weight: 300;
    line-height: 1;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    color: #FF6B3D;
    flex-shrink: 0;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
}

.faq-item .faq-question:hover {
    color: #FF6B3D;
}

.faq-item .faq-answer {
    padding: 0 24px 20px;
    display: none;
    color: var(--text-subtle);
    font-size: 0.92rem;
    line-height: 1.65;
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeSlideDown 0.35s ease-out;
}

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

/* =============================================
   CTA 横幅
   ============================================= */
.cta-banner {
    padding: 68px 40px;
    text-align: center;
    border-radius: 24px;
    background: linear-gradient(135deg, #FF6B3D 0%, #FF9F1C 50%, #FFC53D 100%);
    color: #fff;
    box-shadow: 0 24px 60px rgba(255, 107, 61, 0.3);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    right: -40px;
    top: -40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    pointer-events: none;
}

.cta-banner::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 100px;
    left: -20px;
    bottom: -20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.05rem;
    margin-bottom: 28px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary {
    background: #fff;
    color: #FF6B3D;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);
}

/* =============================================
   页脚
   ============================================= */
.site-footer {
    padding: 56px 0 28px;
    background: #F2ECE4;
    border-top: 1px solid rgba(26, 26, 46, 0.06);
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    right: -100px;
    bottom: -100px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 61, 0.05), transparent 70%);
    pointer-events: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    position: relative;
    z-index: 1;
}

.footer-brand {
    padding-right: 20px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-subtle);
    font-size: 0.9rem;
    line-height: 1.65;
    max-width: 300px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text);
    letter-spacing: 0.02em;
    position: relative;
    padding-bottom: 8px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, #FF6B3D, #FFC53D);
    border-radius: 2px;
}

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

.footer-col a:hover {
    color: #FF6B3D;
    transform: translateX(2px);
}

.footer-col a::before {
    content: '›';
    font-size: 1rem;
    color: #FF6B3D;
    opacity: 0;
    transition: opacity 0.2s;
}

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

.footer-bottom {
    border-top: 1px solid rgba(26, 26, 46, 0.1);
    margin-top: 44px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-subtle);
    position: relative;
    z-index: 1;
}

.footer-bottom a {
    color: #FF6B3D;
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* =============================================
   工具类
   ============================================= */
.text-accent {
    background: linear-gradient(135deg, #FF6B3D, #FF9F1C);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    color: var(--text-subtle);
    font-size: 0.95rem;
    line-height: 1.7;
    text-align: center;
}

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

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

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

@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.6rem;
    }

    .hero-image {
        width: 280px;
    }

    .feature-block {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

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

    .hero .container {
        flex-direction: column;
        gap: 32px;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.2rem;
        line-height: 1.2;
    }

    .hero p {
        margin: 0 auto 28px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-eyebrow {
        margin-bottom: 16px;
    }

    .hero-image {
        width: 220px;
        transform: none;
    }

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

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

    .feature-text {
        padding: 0;
    }

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

    .stat-item {
        padding: 28px 16px;
    }

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

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

    .footer-brand {
        grid-column: 1 / -1;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #FFFDF7;
        padding: 24px;
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        box-shadow: 0 20px 40px rgba(26, 26, 46, 0.1);
        border-top: 1px solid rgba(26, 26, 46, 0.04);
        border-radius: 0 0 20px 20px;
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        font-size: 1rem;
        padding: 8px 0;
        width: 100%;
        border-bottom: 1px solid rgba(26, 26, 46, 0.04);
    }

    .main-nav a:last-child {
        border-bottom: none;
    }

    .nav-cta {
        text-align: center;
        margin-top: 8px;
    }

    .menu-toggle {
        display: flex;
    }

    .cta-banner {
        padding: 48px 24px;
    }

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

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

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

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

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

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

    .section-title {
        font-size: 1.5rem;
    }

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

    .stat-item {
        padding: 20px 12px;
    }

    .content-wall-item img {
        height: 160px;
    }

    .cta-banner {
        padding: 36px 20px;
        border-radius: 16px;
    }

    .cta-banner h2 {
        font-size: 1.3rem;
    }

    .footer-brand p {
        font-size: 0.85rem;
    }
}