:root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.72);
    --surface-glass-border: rgba(255, 255, 255, 0.5);
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #d32f2f;
    --accent-hover: #b71c1c;
    --accent-glow: rgba(211, 47, 47, 0.35);
    --accent-soft: #fee2e2;
    --gradient-start: #d32f2f;
    --gradient-mid: #f43f5e;
    --gradient-end: #7c3aed;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
    --shadow-accent: 0 8px 24px rgba(211, 47, 47, 0.28);
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --blur: 16px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    --header-height: 68px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 16px);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    background-image:
        radial-gradient(circle at 12% 8%, rgba(211, 47, 47, 0.07), transparent 42%),
        radial-gradient(circle at 88% 4%, rgba(124, 58, 237, 0.07), transparent 40%),
        radial-gradient(circle at 50% 100%, rgba(244, 63, 94, 0.05), transparent 55%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.75;
    font-size: 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

img,
svg {
    max-width: 100%;
    height: auto;
    display: block;
}

ul,
ol {
    list-style-position: inside;
}

::selection {
    background: var(--accent);
    color: #fff;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ============ 头部 & 导航 ============ */
.site-header {
    background: var(--surface-glass);
    -webkit-backdrop-filter: saturate(180%) blur(var(--blur));
    backdrop-filter: saturate(180%) blur(var(--blur));
    box-shadow: 0 1px 0 var(--border), var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--surface-glass-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    flex-wrap: wrap;
    gap: 12px;
    min-height: var(--header-height);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-area svg {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-accent);
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.logo-area:hover svg {
    transform: rotate(-6deg) scale(1.06);
    box-shadow: 0 10px 28px var(--accent-glow);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.logo-text span {
    background: linear-gradient(120deg, var(--gradient-start), var(--gradient-mid));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 6px;
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    position: relative;
    transition: color 0.25s var(--ease), background 0.25s var(--ease);
    white-space: nowrap;
}

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

.main-nav a:hover,
.main-nav a[aria-current="page"] {
    color: var(--accent);
    background: var(--accent-soft);
    text-decoration: none;
}

.main-nav a:hover::after,
.main-nav a[aria-current="page"]::after {
    width: 60%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.search-form {
    display: flex;
    align-items: center;
    background: var(--surface);
    border-radius: var(--radius-pill);
    padding: 4px 4px 4px 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.search-form:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.search-form input {
    border: none;
    background: transparent;
    padding: 6px 8px;
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    width: 150px;
    color: var(--text-primary);
    transition: width 0.3s var(--ease);
}

.search-form input::placeholder {
    color: var(--text-muted);
}

.search-form input:focus {
    width: 190px;
}

.search-form button {
    background: linear-gradient(120deg, var(--gradient-start), var(--gradient-mid));
    border: none;
    border-radius: var(--radius-pill);
    padding: 7px 18px;
    color: #fff;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    font-size: 0.9rem;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), filter 0.25s var(--ease);
    box-shadow: var(--shadow-accent);
}

.search-form button:hover {
    transform: translateY(-2px);
    filter: brightness(1.06);
    box-shadow: 0 10px 26px var(--accent-glow);
}

.search-form button:active {
    transform: translateY(0);
}

.mobile-menu-toggle {
    display: none;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px 12px;
    transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}

.mobile-menu-toggle:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

/* ============ 面包屑 ============ */
.breadcrumb {
    padding: 12px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    background: var(--surface-glass);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin-left: 6px;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

/* ============ 主内容区 ============ */
main {
    padding: 32px 0 56px;
}

.section {
    margin-bottom: 56px;
    position: relative;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 28px;
    position: relative;
    padding-bottom: 12px;
    color: var(--text-primary);
    letter-spacing: -0.4px;
}

.section-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 64px;
    height: 4px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    border-radius: var(--radius-pill);
    box-shadow: 0 2px 10px var(--accent-glow);
}

.section-subtitle {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 28px 0 12px;
    color: var(--text-primary);
    padding-left: 14px;
    position: relative;
}

.section-subtitle::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.35em;
    bottom: 0.35em;
    width: 4px;
    border-radius: var(--radius-pill);
    background: linear-gradient(180deg, var(--gradient-start), var(--gradient-end));
}

/* ============ 卡片网格 ============ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(211, 47, 47, 0.06), transparent 45%, rgba(124, 58, 237, 0.06));
    opacity: 0;
    transition: opacity 0.35s var(--ease);
    pointer-events: none;
}

.card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-strong);
}

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

.card:hover::after {
    transform: scaleX(1);
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.card ul {
    list-style: none;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

.card ul li {
    padding: 4px 0;
    border-bottom: 1px dashed var(--border);
}

.card ul li:last-child {
    border-bottom: none;
}

.meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
    align-items: center;
}

.tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    padding: 3px 12px;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.tag:hover {
    transform: translateY(-2px);
    background: var(--accent);
    color: #fff;
}

/* ============ 品牌介绍区块 (渐变 Banner) ============ */
.brand-intro {
    display: flex;
    gap: 40px;
    align-items: center;
    flex-wrap: wrap;
    background:
        linear-gradient(135deg, rgba(211, 47, 47, 0.96) 0%, rgba(244, 63, 94, 0.92) 45%, rgba(124, 58, 237, 0.94) 100%);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: 0 24px 60px rgba(211, 47, 47, 0.28);
    border: 1px solid rgba(255, 255, 255, 0.18);
    position: relative;
    overflow: hidden;
    color: #fff;
}

.brand-intro::before {
    content: "";
    position: absolute;
    top: -60%;
    right: -20%;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 65%);
    border-radius: 50%;
    pointer-events: none;
    animation: floatGlow 9s ease-in-out infinite;
}

.brand-intro::after {
    content: "";
    position: absolute;
    bottom: -50%;
    left: -10%;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.14), transparent 68%);
    border-radius: 50%;
    pointer-events: none;
    animation: floatGlow 12s ease-in-out infinite reverse;
}

@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-24px, 24px) scale(1.08); }
}

.brand-intro-text {
    flex: 1 1 420px;
    position: relative;
    z-index: 2;
}

.brand-intro-text h1 {
    font-size: 2.1rem;
    margin-bottom: 18px;
    color: #fff;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
}

.brand-intro-text p {
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.92);
    font-size: 1rem;
}

.brand-intro-text strong {
    color: #fff;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.16);
    padding: 1px 7px;
    border-radius: 6px;
}

.brand-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    margin-top: 28px;
    position: relative;
    z-index: 2;
}

.stat-item {
    text-align: center;
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.22);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    transition: transform 0.35s var(--ease), background 0.35s var(--ease);
    min-width: 110px;
}

.stat-item:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.22);
}

.stat-number {
    font-size: 1.9rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    letter-spacing: -0.5px;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.88);
    margin-top: 4px;
}

.brand-intro > div:last-child {
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 12px 32px rgba(0, 0, 0, 0.22));
    transition: transform 0.5s var(--ease);
}

.brand-intro > div:last-child:hover {
    transform: scale(1.03) rotate(1deg);
}

.brand-intro svg {
    border-radius: var(--radius-lg);
}

/* ============ FAQ 手风琴 ============ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.faq-item:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
}

.faq-item.open {
    border-color: var(--accent);
    box-shadow: var(--shadow-accent);
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 18px 22px;
    font-size: 1.05rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.faq-question:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    line-height: 24px;
    text-align: center;
    border-radius: 50%;
    background: var(--accent-soft);
    transition: transform 0.35s var(--ease), background 0.35s var(--ease), color 0.35s var(--ease);
}

.faq-item.open .faq-question::after {
    content: "−";
    transform: rotate(180deg);
    background: var(--accent);
    color: #fff;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s var(--ease), padding 0.35s var(--ease), opacity 0.35s var(--ease);
    padding: 0 22px;
    color: var(--text-secondary);
    background: linear-gradient(180deg, transparent, rgba(211, 47, 47, 0.03));
    opacity: 0;
}

.faq-item.open .faq-answer {
    max-height: 640px;
    padding: 0 22px 22px;
    opacity: 1;
}

.faq-answer p {
    margin-top: 8px;
    font-size: 0.95rem;
}

/* ============ 文章列表 ============ */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.article-item {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.article-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--gradient-start), var(--gradient-end));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s var(--ease);
}

.article-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-strong);
}

.article-item:hover::before {
    transform: scaleY(1);
}

.article-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.5;
    font-weight: 700;
}

.article-item h3 a {
    color: var(--text-primary);
    transition: color 0.25s var(--ease);
}

.article-item h3 a:hover {
    color: var(--accent);
    text-decoration: none;
}

.article-item .meta {
    margin-bottom: 12px;
}

.article-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex: 1;
    margin-bottom: 16px;
}

.read-more {
    font-weight: 600;
    font-size: 0.9rem;
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s var(--ease), color 0.25s var(--ease);
}

.read-more:hover {
    gap: 12px;
    text-decoration: none;
}

/* ============ 表格样式 ============ */
.info-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.info-table th,
.info-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.info-table th {
    background: linear-gradient(120deg, rgba(211, 47, 47, 0.08), rgba(124, 58, 237, 0.08));
    font-weight: 700;
    color: var(--text-primary);
    width: 22%;
    white-space: nowrap;
    font-size: 0.92rem;
}

.info-table td {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.info-table tbody tr,
.info-table tr {
    transition: background 0.25s var(--ease);
}

.info-table tr:hover td {
    background: rgba(211, 47, 47, 0.035);
}

.info-table tr:last-child th,
.info-table tr:last-child td {
    border-bottom: none;
}

/* ============ 页脚 ============ */
.site-footer {
    background: linear-gradient(160deg, #0b1a2f 0%, #0f172a 55%, #1a1033 100%);
    color: #cbd5e1;
    padding: 56px 0 24px;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 36px;
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 18px;
    font-weight: 700;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 2px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid));
    border-radius: var(--radius-pill);
}

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

.footer-col li {
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: #94a3b8;
    transition: transform 0.25s var(--ease), color 0.25s var(--ease);
}

.footer-col li:hover {
    transform: translateX(4px);
}

.footer-col a {
    color: #94a3b8;
}

.footer-col a:hover {
    color: #fff;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: #64748b;
}

.footer-bottom a {
    color: #94a3b8;
}

.footer-bottom a:hover {
    color: #fff;
}

/* ============ 返回顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-accent);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(0.9);
    transition: opacity 0.35s var(--ease), visibility 0.35s var(--ease), transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
    border: none;
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-6px) scale(1.06);
    box-shadow: 0 14px 34px var(--accent-glow);
}

.back-to-top:active {
    transform: translateY(-2px) scale(0.98);
}

/* ============ 滚动动画 (CSS 原生) ============ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.section {
    animation: fadeInUp 0.7s var(--ease) both;
}

.section:nth-child(1) { animation-delay: 0.05s; }
.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.15s; }
.section:nth-child(4) { animation-delay: 0.2s; }
.section:nth-child(5) { animation-delay: 0.25s; }
.section:nth-child(6) { animation-delay: 0.3s; }
.section:nth-child(7) { animation-delay: 0.35s; }
.section:nth-child(8) { animation-delay: 0.4s; }

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============ 响应式 ============ */
@media (max-width: 992px) {
    .brand-intro {
        padding: 36px 28px;
        gap: 28px;
    }

    .brand-intro-text h1 {
        font-size: 1.8rem;
    }

    .brand-intro > div:last-child {
        flex: 1 1 100% !important;
        display: flex;
        justify-content: center;
    }

    .brand-intro svg {
        max-width: 240px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: auto;
    }

    .header-inner {
        justify-content: space-between;
        padding: 10px 0;
        row-gap: 0;
    }

    .main-nav {
        display: none;
        width: 100%;
        order: 3;
        margin-top: 12px;
        padding-top: 12px;
        border-top: 1px solid var(--border);
        animation: fadeIn 0.35s var(--ease);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 4px;
    }

    .main-nav a {
        display: block;
        border-radius: var(--radius-sm);
        padding: 10px 14px;
    }

    .main-nav a::after {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .search-form input {
        width: 90px;
    }

    .search-form input:focus {
        width: 120px;
    }

    .brand-intro {
        padding: 28px 20px;
        border-radius: var(--radius);
    }

    .brand-intro-text h1 {
        font-size: 1.5rem;
    }

    .brand-stats {
        gap: 12px;
    }

    .stat-item {
        flex: 1 1 calc(50% - 6px);
        min-width: 0;
        padding: 10px 12px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .section {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 1.4rem;
        margin-bottom: 20px;
    }

    .section-subtitle {
        font-size: 1.05rem;
    }

    .card-grid,
    .article-list {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .card,
    .article-item {
        padding: 20px;
    }

    .info-table th,
    .info-table td {
        display: block;
        width: 100%;
        padding: 10px 16px;
    }

    .info-table th {
        border-bottom: none;
        padding-bottom: 2px;
        background: transparent;
        color: var(--accent);
        font-size: 0.82rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    .info-table td {
        padding-top: 2px;
        border-bottom: 1px solid var(--border);
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .footer-bottom {
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .search-form {
        display: none;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .logo-area svg {
        width: 34px;
        height: 34px;
    }

    .brand-intro-text h1 {
        font-size: 1.3rem;
    }

    .stat-item {
        flex: 1 1 100%;
    }

    .faq-question {
        padding: 15px 16px;
        font-size: 0.98rem;
    }

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

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

/* ============ 暗黑模式 ============ */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f172a;
        --surface: #1e293b;
        --surface-glass: rgba(30, 41, 59, 0.72);
        --surface-glass-border: rgba(148, 163, 184, 0.16);
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --accent: #f87171;
        --accent-hover: #ef4444;
        --accent-glow: rgba(248, 113, 113, 0.3);
        --accent-soft: rgba(248, 113, 113, 0.14);
        --border: #334155;
        --border-strong: #475569;
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
        --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
        --shadow-accent: 0 8px 24px rgba(248, 113, 113, 0.25);
    }

    body {
        background-image:
            radial-gradient(circle at 12% 8%, rgba(248, 113, 113, 0.09), transparent 42%),
            radial-gradient(circle at 88% 4%, rgba(124, 58, 237, 0.12), transparent 40%),
            radial-gradient(circle at 50% 100%, rgba(244, 63, 94, 0.06), transparent 55%);
    }

    .logo-text {
        color: #f1f5f9;
    }

    .logo-text span {
        background: linear-gradient(120deg, #f87171, #fb7185);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .search-form {
        background: #0f172a;
    }

    .search-form button {
        background: linear-gradient(120deg, #ef4444, #f43f5e);
    }

    .brand-intro {
        background: linear-gradient(135deg, rgba(185, 28, 28, 0.96) 0%, rgba(190, 24, 93, 0.92) 45%, rgba(91, 33, 182, 0.94) 100%);
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
    }

    .faq-question:hover {
        background: rgba(248, 113, 113, 0.1);
    }

    .faq-answer {
        background: linear-gradient(180deg, transparent, rgba(248, 113, 113, 0.05));
    }

    .info-table th {
        background: linear-gradient(120deg, rgba(248, 113, 113, 0.12), rgba(124, 58, 237, 0.12));
    }

    .info-table tr:hover td {
        background: rgba(248, 113, 113, 0.06);
    }

    .site-footer {
        background: linear-gradient(160deg, #020617 0%, #0b1120 55%, #150b2e 100%);
    }

    .card::before {
        background: linear-gradient(135deg, rgba(248, 113, 113, 0.08), transparent 45%, rgba(124, 58, 237, 0.1));
    }

    .back-to-top {
        background: linear-gradient(135deg, #ef4444, #f43f5e);
    }
}

/* ============ 打印样式 ============ */
@media print {
    .site-header,
    .breadcrumb,
    .back-to-top,
    .site-footer,
    .mobile-menu-toggle,
    .search-form {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .section {
        animation: none;
        page-break-inside: avoid;
    }
}