/* =============================================
   91网 官方网站 - 极简奢华风格
   深灰 + 香槟金 + 纯黑 配色
   ============================================= */

:root {
    --black:       #0d0d0d;
    --dark:        #1a1a1a;
    --dark-mid:    #2a2a2a;
    --gray:        #4a4a4a;
    --light-gray:  #f5f5f3;
    --white:       #ffffff;
    --gold:        #d4af37;
    --gold-light:  #e8c96a;
    --gold-dark:   #b8960c;
    --text:        #333333;
    --text-light:  #888888;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    margin: 0; padding: 0;
    background: var(--white);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
}

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

a { text-decoration: none; color: inherit; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== HEADER ===== */
.header {
    background: var(--black);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    padding-bottom: 16px;
}

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

.logo-wrap img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    object-fit: cover;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 2px;
}

.nav ul {
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    gap: 28px;
}

.nav a {
    color: #ccc;
    font-size: 14px;
    letter-spacing: 0.5px;
    transition: color 0.3s;
    white-space: nowrap;
}

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

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--gold);
    color: var(--gold);
    padding: 6px 12px;
    cursor: pointer;
    font-size: 18px;
    border-radius: 4px;
}

/* 搜索框 */
.search-bar {
    background: var(--dark);
    border-top: 1px solid #2a2a2a;
    padding: 10px 0;
}

.search-inner {
    display: flex;
    max-width: 600px;
}

.search-inner input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid #444;
    border-right: none;
    border-radius: 4px 0 0 4px;
    background: #111;
    color: #fff;
    font-size: 14px;
    outline: none;
}

.search-inner input::placeholder { color: #666; }

.btn-search {
    padding: 10px 24px;
    background: var(--gold);
    color: var(--black);
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: background 0.3s;
}

.btn-search:hover { background: var(--gold-light); }

/* ===== BANNER ===== */
.banner {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-color: var(--dark);
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,0,0,0.82) 0%, rgba(0,0,0,0.55) 100%);
}

.banner-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding: 80px 24px;
}

.banner-tag {
    font-size: 13px;
    letter-spacing: 4px;
    color: var(--gold);
    text-transform: uppercase;
    margin: 0 0 20px;
}

.banner-title {
    font-size: clamp(28px, 5vw, 52px);
    font-weight: 700;
    color: var(--white);
    margin: 0 0 16px;
    line-height: 1.2;
}

.banner-sub {
    font-size: clamp(16px, 2.5vw, 22px);
    color: var(--gold-light);
    margin: 0 0 20px;
    font-weight: 400;
}

.banner-desc {
    font-size: 16px;
    color: #bbb;
    margin: 0 0 16px;
    line-height: 1.8;
}

.banner-domain {
    font-size: 14px;
    color: var(--gold);
    margin: 0 0 32px;
    font-style: italic;
}

.btn-gold {
    display: inline-block;
    padding: 14px 36px;
    background: var(--gold);
    color: var(--black);
    font-weight: 700;
    font-size: 15px;
    border-radius: 2px;
    letter-spacing: 1px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-gold:hover {
    background: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212,175,55,0.3);
}

.btn-full { width: 100%; text-align: center; }

/* ===== SECTIONS ===== */
.section { padding: 90px 0; }

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

.bg-dark { background: var(--dark); }

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--gold);
    text-transform: uppercase;
    margin: 0 0 12px;
}

.section-header h2 {
    font-size: clamp(24px, 4vw, 36px);
    color: var(--dark);
    margin: 0 0 16px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 48px;
    height: 2px;
    background: var(--gold);
    margin: 16px auto 0;
}

.section-header.light h2 { color: var(--white); }

.section-desc {
    font-size: 15px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.section-desc.light-text { color: #aaa; }

/* ===== VIDEO GRID ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.video-card {
    background: var(--white);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.07);
    transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.14);
}

.video-cover {
    position: relative;
    overflow: hidden;
    background: var(--black);
    aspect-ratio: 16/9;
}

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

.video-card:hover .video-cover img,
.video-card:hover .video-cover video {
    transform: scale(1.04);
}

.play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.video-card:hover .play-overlay { opacity: 1; }

.play-icon {
    width: 60px;
    height: 60px;
    background: rgba(212,175,55,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--black);
    padding-left: 4px;
}

.video-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--gold);
    color: var(--black);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 2px;
    letter-spacing: 1px;
}

.video-info { padding: 20px; }

.video-info h3 {
    font-size: 16px;
    color: var(--dark);
    margin: 0 0 8px;
    line-height: 1.4;
}

.video-meta {
    font-size: 12px;
    color: var(--gold);
    margin: 0 0 10px;
    letter-spacing: 0.5px;
}

.video-stats {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tags span {
    background: var(--light-gray);
    color: var(--gray);
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 2px;
    letter-spacing: 0.5px;
}

/* ===== SERVICES ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.service-item {
    background: var(--white);
    padding: 36px 28px;
    border-radius: 4px;
    text-align: center;
    border-bottom: 3px solid transparent;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}

.service-item:hover {
    border-bottom-color: var(--gold);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.service-icon {
    font-size: 28px;
    color: var(--gold);
    margin-bottom: 16px;
}

.service-item h3 {
    font-size: 18px;
    color: var(--dark);
    margin: 0 0 12px;
}

.service-item p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
    line-height: 1.7;
}

/* ===== PROCESS ===== */
.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.step {
    text-align: center;
    max-width: 200px;
    padding: 28px 16px;
}

.step-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--gold);
    line-height: 1;
    margin-bottom: 12px;
}

.step h4 {
    font-size: 16px;
    color: var(--dark);
    margin: 0 0 8px;
}

.step p {
    font-size: 13px;
    color: var(--text-light);
    margin: 0;
}

.step-arrow {
    font-size: 24px;
    color: var(--gold);
    margin-top: 40px;
    opacity: 0.6;
}

/* ===== SPACE ===== */
.space-img-wrap {
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 12px 48px rgba(0,0,0,0.15);
}

.space-img-wrap img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* ===== TESTIMONIALS ===== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--white);
    padding: 28px;
    margin: 0;
    border-radius: 4px;
    border-left: 4px solid var(--gold);
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.review-card p {
    font-size: 14px;
    color: var(--text);
    line-height: 1.8;
    margin: 0 0 16px;
    font-style: italic;
}

.review-card footer {
    font-size: 13px;
    color: var(--gold);
    font-weight: 600;
}

/* ===== CASES ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.case-item {
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.07);
    transition: transform 0.3s;
}

.case-item:hover { transform: translateY(-4px); }

.case-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.case-info {
    padding: 20px;
    background: var(--white);
}

.case-info h4 {
    font-size: 16px;
    color: var(--dark);
    margin: 0 0 8px;
}

.case-info p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
}

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

.faq-item {
    border-bottom: 1px solid #e8e8e8;
    padding: 24px 0;
}

.faq-item:last-child { border-bottom: none; }

.faq-item dt {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
    cursor: pointer;
}

.faq-item dd {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
    line-height: 1.8;
    padding-left: 16px;
    border-left: 2px solid var(--gold);
}

/* ===== BOOKING ===== */
.booking-form {
    max-width: 480px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-input {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid #ddd;
    border-radius: 2px;
    font-size: 15px;
    outline: none;
    transition: border-color 0.3s;
    background: var(--white);
    color: var(--text);
    font-family: inherit;
}

.form-input:focus { border-color: var(--gold); }

/* ===== ADDRESS ===== */
.address-info {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.addr-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px 24px;
    background: rgba(255,255,255,0.05);
    border-radius: 4px;
    border-left: 3px solid var(--gold);
}

.addr-label {
    font-size: 13px;
    color: var(--gold);
    min-width: 80px;
    font-weight: 600;
    letter-spacing: 1px;
}

.addr-val {
    font-size: 15px;
    color: #ccc;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--black);
    padding: 48px 0 24px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
    padding-bottom: 32px;
    border-bottom: 1px solid #222;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand img {
    width: 50px;
    height: 50px;
    border-radius: 4px;
    object-fit: cover;
}

.footer-logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 2px;
}

.footer-nav {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-nav a {
    font-size: 13px;
    color: #888;
    transition: color 0.3s;
}

.footer-nav a:hover { color: var(--gold); }

.footer-contact {
    padding: 24px 0;
    border-bottom: 1px solid #222;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 40px;
}

.footer-contact p {
    margin: 0;
    font-size: 13px;
    color: #666;
}

.footer-bottom {
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom p {
    margin: 0;
    font-size: 12px;
    color: #555;
}

/* ===== GOLD SECTION TAG ===== */
.gold { color: var(--gold); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .nav { display: none; }
    .nav.open { display: block; }
    .nav ul { flex-direction: column; gap: 0; padding: 16px 0; }
    .nav li a { display: block; padding: 10px 0; border-bottom: 1px solid #222; }
    .nav-toggle { display: block; }
    .process-steps { flex-direction: column; align-items: center; }
    .step-arrow { transform: rotate(90deg); margin: 0; }
    .footer-top { flex-direction: column; }
    .footer-bottom { flex-direction: column; }
}

@media (max-width: 600px) {
    .section { padding: 60px 0; }
    .banner { min-height: 480px; }
    .video-grid,
    .services-grid,
    .reviews-grid,
    .cases-grid { grid-template-columns: 1fr; }
    .search-inner { flex-direction: column; }
    .search-inner input { border-right: 1px solid #444; border-radius: 4px 4px 0 0; }
    .btn-search { border-radius: 0 0 4px 4px; }
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
    background: var(--light-gray);
    padding: 12px 0;
    font-size: 13px;
    color: var(--text-light);
    border-bottom: 1px solid #eee;
}

.breadcrumb a {
    color: var(--gold);
    text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }

/* ===== ABOUT PAGE ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-text h2 {
    font-size: 20px;
    color: var(--dark);
    margin: 0 0 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--gold);
    display: inline-block;
}

.about-text p {
    font-size: 15px;
    color: var(--text);
    line-height: 1.9;
    margin: 0 0 28px;
}

.about-img img {
    width: 100%;
    border-radius: 4px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }
}