/* =============================================
   17C 官网主样式文件
   17C Brand Portal - Main Stylesheet
   ============================================= */

/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #e85d04;
    --primary-dark: #c44f03;
    --primary-light: #f48c06;
    --secondary: #1a1a2e;
    --accent: #ffd60a;
    --text-dark: #1a1a2e;
    --text-mid: #444;
    --text-light: #777;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #f0f2f5;
    --border: #e0e0e0;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-hover: 0 6px 24px rgba(232,93,4,0.18);
    --radius: 8px;
    --radius-lg: 14px;
    --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    --transition: all 0.25s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
    list-style: none;
}

/* =============================================
   Layout Utilities
   ============================================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 56px 0;
}

.section-alt {
    background: var(--bg-light);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title::before {
    content: '';
    display: inline-block;
    width: 5px;
    height: 24px;
    background: var(--primary);
    border-radius: 3px;
}

.section-more {
    font-size: 0.9rem;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 5px 16px;
    border-radius: 20px;
    transition: var(--transition);
}

.section-more:hover {
    background: var(--primary);
    color: #fff;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: 28px; }

/* =============================================
   Top Bar
   ============================================= */
.top-bar {
    background: var(--secondary);
    color: #aaa;
    font-size: 0.8rem;
    padding: 6px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: #aaa;
    margin-left: 16px;
}

.top-bar a:hover { color: var(--primary); }

.top-bar-domain {
    color: var(--primary-light);
    font-weight: 600;
}

/* =============================================
   Header & Navigation
   ============================================= */
.site-header {
    background: var(--bg-white);
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-main {
    padding: 14px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-mark {
    width: 46px;
    height: 46px;
    background: var(--primary);
    color: #fff;
    font-size: 1.3rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    letter-spacing: -1px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
}

.logo-slogan {
    font-size: 0.72rem;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-submit {
    background: var(--primary);
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.88rem;
    font-weight: 600;
    transition: var(--transition);
}

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

/* Navigation */
.main-nav {
    background: var(--secondary);
}

.nav-list {
    display: flex;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 12px 18px;
    color: #ddd;
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-light);
    background: rgba(255,255,255,0.06);
}

.nav-item.hot .nav-link::after {
    content: 'HOT';
    font-size: 0.6rem;
    background: var(--primary);
    color: #fff;
    padding: 1px 4px;
    border-radius: 3px;
    margin-left: 4px;
    vertical-align: super;
}

/* Dropdown */
.nav-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 160px;
    box-shadow: var(--shadow);
    border-radius: 0 0 var(--radius) var(--radius);
    z-index: 999;
    border-top: 2px solid var(--primary);
}

.nav-item:hover .nav-dropdown {
    display: block;
}

.nav-dropdown a {
    display: block;
    padding: 10px 18px;
    color: var(--text-mid);
    font-size: 0.88rem;
    border-bottom: 1px solid var(--bg-light);
}

.nav-dropdown a:hover {
    color: var(--primary);
    background: var(--bg-light);
    padding-left: 22px;
}

/* =============================================
   Search Bar
   ============================================= */
.search-bar-wrap {
    background: var(--bg-gray);
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}

.search-form {
    display: flex;
    max-width: 680px;
    margin: 0 auto;
    background: #fff;
    border-radius: 30px;
    border: 2px solid var(--primary);
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(232,93,4,0.1);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    padding: 11px 20px;
    font-size: 0.95rem;
    font-family: var(--font-main);
    color: var(--text-dark);
    background: transparent;
}

.search-input::placeholder {
    color: #bbb;
}

.search-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0 28px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-main);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.search-btn:hover {
    background: var(--primary-dark);
}

.search-tags {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.search-tag {
    font-size: 0.8rem;
    color: var(--text-light);
    padding: 3px 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.search-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* =============================================
   Hero / Banner
   ============================================= */
.hero-section {
    background: var(--bg-light);
    padding: 32px 0 40px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.hero-main {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16/9;
    cursor: pointer;
}

.hero-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.hero-main:hover img {
    transform: scale(1.03);
}

.hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.75));
    padding: 40px 24px 24px;
}

.hero-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
    font-weight: 600;
}

.hero-title {
    color: #fff;
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}

.hero-meta {
    color: rgba(255,255,255,0.75);
    font-size: 0.8rem;
    display: flex;
    gap: 12px;
}

.hero-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.hero-side-item {
    display: flex;
    gap: 14px;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.hero-side-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateX(3px);
}

.hero-side-img {
    width: 110px;
    min-width: 110px;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.hero-side-content {
    padding: 12px 14px 12px 0;
    flex: 1;
}

.hero-side-tag {
    font-size: 0.72rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 5px;
}

.hero-side-title {
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hero-side-meta {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 6px;
}

/* =============================================
   Video Cards
   ============================================= */
.video-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #111;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease, opacity 0.3s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.06);
    opacity: 0.85;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 56px;
    height: 56px;
    background: rgba(232, 93, 4, 0.92);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(232,93,4,0.5);
}

.video-play-btn svg {
    width: 22px;
    height: 22px;
    fill: #fff;
    margin-left: 4px;
}

.video-card:hover .video-play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.video-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 700;
}

.video-info {
    padding: 14px 16px 16px;
}

.video-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.45;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-card:hover .video-title {
    color: var(--primary);
}

.video-stats {
    display: flex;
    gap: 14px;
    font-size: 0.78rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.video-author {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.video-author img {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    object-fit: cover;
}

/* =============================================
   News / Article Cards
   ============================================= */
.news-card {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

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

.news-card:hover .news-card-title {
    color: var(--primary);
}

.news-card-img {
    width: 120px;
    min-width: 120px;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius);
}

.news-card-content { flex: 1; }

.news-card-tag {
    font-size: 0.72rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.news-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--text-dark);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.news-card-desc {
    font-size: 0.82rem;
    color: var(--text-light);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 8px;
}

.news-card-meta {
    font-size: 0.75rem;
    color: #aaa;
    display: flex;
    gap: 12px;
}

/* =============================================
   Hot Ranking List
   ============================================= */
.rank-list { }

.rank-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--bg-gray);
    cursor: pointer;
    transition: var(--transition);
}

.rank-item:hover .rank-title {
    color: var(--primary);
}

.rank-num {
    width: 26px;
    height: 26px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    min-width: 26px;
    background: var(--bg-gray);
    color: var(--text-light);
}

.rank-item:nth-child(1) .rank-num { background: #e85d04; color: #fff; }
.rank-item:nth-child(2) .rank-num { background: #f48c06; color: #fff; }
.rank-item:nth-child(3) .rank-num { background: #ffd60a; color: var(--text-dark); }

.rank-content { flex: 1; }

.rank-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.4;
    transition: var(--transition);
}

.rank-meta {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 3px;
}

/* =============================================
   Topic / Special Section
   ============================================= */
.topic-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16/9;
    cursor: pointer;
}

.topic-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.topic-card:hover img {
    transform: scale(1.05);
}

.topic-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(232,93,4,0.8) 0%, rgba(26,26,46,0.7) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    transition: var(--transition);
}

.topic-card:hover .topic-overlay {
    background: linear-gradient(135deg, rgba(232,93,4,0.9) 0%, rgba(26,26,46,0.85) 100%);
}

.topic-label {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.topic-title {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 8px;
}

.topic-desc {
    color: rgba(255,255,255,0.8);
    font-size: 0.82rem;
    line-height: 1.5;
}

.topic-count {
    margin-top: 10px;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.7);
}

/* =============================================
   Author Cards
   ============================================= */
.author-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.author-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 12px;
    border: 3px solid var(--primary-light);
}

.author-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.author-title {
    font-size: 0.8rem;
    color: var(--primary);
    margin-bottom: 10px;
    font-weight: 600;
}

.author-bio {
    font-size: 0.82rem;
    color: var(--text-light);
    line-height: 1.5;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.author-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--text-light);
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.author-stats strong {
    display: block;
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 700;
}

.btn-follow {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 7px 22px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 14px;
    transition: var(--transition);
}

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

/* =============================================
   FAQ Section
   ============================================= */
.faq-item {
    background: #fff;
    border-radius: var(--radius);
    margin-bottom: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.open {
    border-color: var(--primary);
    box-shadow: 0 2px 12px rgba(232,93,4,0.1);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    gap: 12px;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 50%;
    background: var(--bg-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-light);
    transition: var(--transition);
}

.faq-item.open .faq-icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 22px 18px;
    font-size: 0.9rem;
    color: var(--text-mid);
    line-height: 1.7;
    border-top: 1px solid var(--bg-gray);
}

.faq-item.open .faq-answer {
    display: block;
}

/* =============================================
   Reviews / Comments
   ============================================= */
.review-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: var(--shadow-hover);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    min-width: 44px;
}

.review-user-info { flex: 1; }

.review-username {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-dark);
}

.review-date {
    font-size: 0.75rem;
    color: var(--text-light);
}

.review-stars {
    color: var(--accent);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.review-text {
    font-size: 0.88rem;
    color: var(--text-mid);
    line-height: 1.65;
}

.review-tag {
    display: inline-block;
    margin-top: 10px;
    font-size: 0.75rem;
    color: var(--primary);
    background: rgba(232,93,4,0.08);
    padding: 3px 10px;
    border-radius: 10px;
}

/* =============================================
   Tags Cloud
   ============================================= */
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-item {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
    border: 1px solid var(--border);
    color: var(--text-mid);
    cursor: pointer;
    transition: var(--transition);
}

.tag-item:hover,
.tag-item.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* =============================================
   Contact / Submit Section
   ============================================= */
.contact-section {
    background: linear-gradient(135deg, var(--secondary) 0%, #2d2d5e 100%);
    color: #fff;
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.contact-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.contact-desc {
    color: rgba(255,255,255,0.75);
    line-height: 1.7;
    margin-bottom: 24px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.85);
}

.contact-icon {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.contact-form {
    background: rgba(255,255,255,0.07);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 11px 16px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius);
    color: #fff;
    font-size: 0.9rem;
    font-family: var(--font-main);
    transition: var(--transition);
    outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: rgba(255,255,255,0.4);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary-light);
    background: rgba(255,255,255,0.15);
}

.form-textarea {
    height: 100px;
    resize: vertical;
}

.form-select option {
    background: var(--secondary);
    color: #fff;
}

.btn-contact {
    width: 100%;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 13px;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-main);
    transition: var(--transition);
}

.btn-contact:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

/* =============================================
   Footer
   ============================================= */
.site-footer {
    background: var(--secondary);
    color: rgba(255,255,255,0.7);
    padding: 48px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 36px;
    padding-bottom: 36px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo-name {
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.footer-desc {
    font-size: 0.85rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.55);
    margin-bottom: 16px;
}

.footer-domain-display {
    font-size: 0.82rem;
    color: var(--primary-light);
    margin-bottom: 16px;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
    color: #fff;
}

.footer-col-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

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

.footer-links a {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.55);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-bottom {
    padding: 18px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.4);
    margin-left: 16px;
}

.footer-bottom a:hover {
    color: var(--primary-light);
}

.update-time {
    color: var(--primary-light);
    font-weight: 600;
}

/* =============================================
   Breadcrumb
   ============================================= */
.breadcrumb {
    padding: 12px 0;
    font-size: 0.82rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

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

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

.breadcrumb-sep { color: #ccc; }

.breadcrumb-current { color: var(--text-dark); font-weight: 500; }

/* =============================================
   Sidebar Widgets
   ============================================= */
.widget {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.widget-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* =============================================
   Pagination
   ============================================= */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 32px 0;
}

.page-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    font-size: 0.9rem;
    border: 1px solid var(--border);
    color: var(--text-mid);
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .section { padding: 36px 0; }
    .hero-grid { grid-template-columns: 1fr; }
    .hero-side { display: none; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .grid-2-1 { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .nav-list { overflow-x: auto; }
    .header-main { flex-wrap: wrap; gap: 12px; }
    .section-title { font-size: 1.3rem; }
    .hero-title { font-size: 1.1rem; }
    .contact-title { font-size: 1.4rem; }
    .review-card { padding: 16px; }
    .search-form { margin: 0 16px; }
}

@media (max-width: 480px) {
    .top-bar .container { flex-direction: column; gap: 4px; }
    .logo-mark { width: 38px; height: 38px; font-size: 1.1rem; }
    .logo-name { font-size: 1.2rem; }
    .btn-submit { display: none; }
    .video-stats { gap: 8px; }
    .author-stats { gap: 12px; }
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
}

/* =============================================
   Scrollbar
   ============================================= */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* =============================================
   Modal / Video Popup
   ============================================= */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.88);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.video-modal.active {
    display: flex;
}

.video-modal-inner {
    background: #000;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    position: relative;
    overflow: hidden;
}

.video-modal-close {
    position: absolute;
    top: 12px;
    right: 14px;
    color: #fff;
    font-size: 1.6rem;
    cursor: pointer;
    z-index: 1;
    line-height: 1;
    background: rgba(0,0,0,0.5);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-modal video,
.video-modal-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #111;
    color: rgba(255,255,255,0.5);
    font-size: 1rem;
}

/* =============================================
   Notice Bar
   ============================================= */
.notice-bar {
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 8px 0;
    overflow: hidden;
}

.notice-inner {
    display: flex;
    align-items: center;
    gap: 16px;
}

.notice-label {
    background: rgba(0,0,0,0.2);
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.notice-scroll {
    overflow: hidden;
    flex: 1;
}

.notice-text {
    font-size: 0.85rem;
    white-space: nowrap;
    animation: scrollText 30s linear infinite;
}

@keyframes scrollText {
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}