/* DB真人紫黑响应式官网 */
:root {
    --bg: #080611;
    --bg-deep: #0D0918;
    --bg-soft: #151022;
    --card: #16111F;
    --title: #C78BFF;
    --accent: #A96BFF;
    --text: #F5F2FF;
    --muted: #C8BBDD;
    --quiet: #9E8FB6;
    --line: rgba(199,139,255,0.18);
    --shadow: 0 18px 42px rgba(0,0,0,0.48);
    --glow: 0 0 26px rgba(167,99,255,0.28);
    --header-h: 76px;
    --channel-h: 52px;
    --radius: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
    margin: 0;
    min-width: 320px;
    padding-top: calc(var(--header-h) + var(--channel-h));
    background:
        radial-gradient(circle at 8% 7%, rgba(122,43,255,.11), transparent 30%),
        radial-gradient(circle at 88% 18%, rgba(199,139,255,.08), transparent 26%),
        var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
button { color: inherit; }
p { margin: 0 0 1em; }
h1, h2, h3 { margin: 0 0 .65em; line-height: 1.28; }
h1, h2, h3, .section-title { color: var(--title); text-shadow: 0 0 20px rgba(199,139,255,0.20); }
h1 { font-size: clamp(2.35rem, 5vw, 4.8rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.75rem); }
h3 { font-size: 1.08rem; color: var(--text); }
ul { margin: 0; padding-left: 1.25rem; }

.skip-link { position: fixed; left: 16px; top: -80px; z-index: 2000; background: #fff; color: #111; padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { top: 10px; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(8,6,17,0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(199,139,255,0.16);
}
.header-shell {
    width: min(1180px, calc(100% - 36px));
    height: var(--header-h);
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(175px, 1fr) auto minmax(90px, 1fr);
    align-items: center;
    gap: 22px;
}
.logo-text {
    display: inline-block;
    width: max-content;
    font-size: 30px;
    font-weight: 900;
    letter-spacing: 2px;
    background: linear-gradient(180deg, #FFFFFF 0%, #C78BFF 42%, #7A2BFF 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 12px rgba(199,139,255,0.62), 0 0 32px rgba(122,43,255,0.46);
    white-space: nowrap;
}
.logo-text.small { font-size: 24px; }
.nav-core { display: flex; align-items: center; gap: 8px; white-space: nowrap; flex-wrap: nowrap; }
.nav-core a { color: var(--text); padding: 9px 11px; border-radius: 999px; font-size: .94rem; font-weight: 700; transition: .2s ease; }
.nav-core a:hover, .nav-core a.active { color: var(--title); background: rgba(199,139,255,0.10); box-shadow: 0 0 18px rgba(199,139,255,0.16); }
.header-action { justify-self: end; }
.main-btn, .ghost-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 24px;
    border-radius: 999px;
    font-weight: 800;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.main-btn { background: linear-gradient(180deg, #D9A8FF 0%, #8B45FF 55%, #5A19C9 100%); color: #FFFFFF; box-shadow: 0 12px 28px rgba(167,99,255,0.24); }
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(167,99,255,.36); }
.main-btn.compact { min-height: 42px; padding: 0 22px; }
.ghost-btn { border: 1px solid rgba(199,139,255,.35); color: var(--title); background: rgba(199,139,255,.06); }
.ghost-btn:hover { border-color: rgba(199,139,255,.72); box-shadow: var(--glow); transform: translateY(-2px); }

.channel-nav { height: var(--channel-h); background: rgba(13,9,24,0.94); border-top: 1px solid rgba(199,139,255,0.08); overflow-x: auto; white-space: nowrap; scrollbar-width: thin; }
.channel-track { width: min(1180px, calc(100% - 36px)); min-width: max-content; height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 8px; }
.channel-nav a { color: var(--muted); border: 1px solid rgba(199,139,255,0.14); border-radius: 999px; padding: 6px 13px; font-size: .83rem; line-height: 1.4; }
.channel-nav a:hover, .channel-nav a.active { color: var(--title); border-color: rgba(199,139,255,0.45); background: rgba(199,139,255,0.08); }

.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: rgba(199,139,255,.06); padding: 10px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; background: var(--text); margin: 4px 0; border-radius: 2px; }
.mobile-drawer { position: fixed; z-index: 1200; inset: 0 auto 0 0; width: min(84vw, 320px); padding: 20px; background: #0D0918; border-right: 1px solid var(--line); transform: translateX(-105%); transition: transform .24s ease; overflow-y: auto; box-shadow: 24px 0 60px rgba(0,0,0,.52); }
.mobile-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.drawer-close { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: rgba(199,139,255,.08); font-size: 1.6rem; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; gap: 6px; padding: 16px 0 24px; }
.drawer-nav a { padding: 11px 13px; border-radius: 12px; color: var(--muted); font-weight: 700; }
.drawer-nav a:hover, .drawer-nav a.active { color: var(--title); background: rgba(199,139,255,.10); }
.drawer-overlay { position: fixed; z-index: 1100; inset: 0; background: rgba(0,0,0,.62); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.show { opacity: 1; }

.section-shell { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }
.narrow-shell { width: min(860px, calc(100% - 36px)); }
.content-section { padding: 76px 0; }
.soft-section { background: linear-gradient(180deg, rgba(21,16,34,.72), rgba(13,9,24,.55)); border-block: 1px solid rgba(199,139,255,.08); }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading p, .copy-panel p, .hero-copy p { color: var(--muted); }
.section-kicker, .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--accent); font-size: .78rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.section-kicker::before, .eyebrow::before { content: ''; width: 26px; height: 1px; background: var(--accent); box-shadow: 0 0 12px rgba(169,107,255,.8); }

.page-hero { min-height: 590px; padding: 82px 0 70px; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(420px, .98fr); align-items: center; gap: 48px; position: relative; }
.page-hero::before { content: ''; position: absolute; inset: 30px -6% 30px 46%; z-index: -1; background: radial-gradient(circle, rgba(142,70,255,.22), transparent 62%); filter: blur(10px); }
.hero-copy p { max-width: 680px; font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.image-frame { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, rgba(255,255,255,.025), rgba(199,139,255,.045)); box-shadow: var(--shadow); }
.image-frame::after { content: ''; position: absolute; inset: 0; pointer-events: none; box-shadow: inset 0 0 44px rgba(8,6,17,.35); }
.hero-image-frame { min-height: 330px; display: grid; place-items: center; padding: 16px; }
.hero-image-frame img { width: 100%; max-height: 380px; object-fit: contain; }

.split-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .85fr); gap: 46px; align-items: center; }
.split-panel.single { grid-template-columns: 1fr; }
.split-panel.single .copy-panel { max-width: 900px; }
.split-panel.reverse .copy-panel { order: 2; }
.split-panel.reverse .content-image-frame { order: 1; }
.copy-panel { max-width: 680px; }
.inline-links { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 22px; }
.text-link { color: var(--title); font-weight: 800; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.content-image-frame { min-height: 260px; padding: 14px; display: grid; place-items: center; }
.content-image-frame img { width: 100%; height: auto; max-height: 300px; object-fit: contain; }

.feature-grid { display: grid; gap: 18px; }
.feature-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.feature-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.info-card, .zone-card, .review-card, .step-card, .quick-card, .faq-item { background: #16111F; border: 1px solid rgba(199,139,255,0.18); box-shadow: 0 18px 42px rgba(0,0,0,0.48); border-radius: 18px; }
.info-card { padding: 24px; min-height: 210px; display: flex; flex-direction: column; }
.info-card p { color: var(--muted); font-size: .94rem; }
.info-card .text-link { margin-top: auto; }
.card-index { width: 38px; height: 30px; display: inline-grid; place-items: center; margin-bottom: 18px; border: 1px solid rgba(199,139,255,.28); border-radius: 999px; color: var(--accent); font-size: .75rem; font-weight: 900; }

.steps-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.step-card { display: flex; align-items: flex-start; gap: 18px; padding: 24px; }
.step-card > span { flex: 0 0 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; background: linear-gradient(180deg, rgba(217,168,255,.24), rgba(90,25,201,.24)); border: 1px solid rgba(199,139,255,.26); color: var(--title); font-weight: 900; }
.step-card p { color: var(--muted); margin: 0; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card { margin: 0; padding: 25px; }
.review-card p { color: var(--muted); }
.review-card footer { display: flex; justify-content: space-between; gap: 12px; padding-top: 18px; border-top: 1px solid var(--line); }
.review-card footer strong { color: var(--text); }
.review-card footer span { color: var(--quiet); font-size: .85rem; }

.faq-list { display: grid; gap: 12px; }
.faq-item { overflow: hidden; }
.faq-item summary { list-style: none; cursor: pointer; padding: 19px 54px 19px 22px; font-weight: 800; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); color: var(--title); font-size: 1.35rem; }
.faq-item[open] summary::after { content: '−'; }
.faq-answer { padding: 0 22px 20px; color: var(--muted); }
.faq-answer p { margin: 0; }
.center-action { text-align: center; margin-top: 24px; }

.notice-panel { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; padding: 34px; border: 1px solid rgba(199,139,255,.22); border-radius: 22px; background: linear-gradient(135deg, rgba(122,43,255,.13), rgba(22,17,31,.9)); box-shadow: var(--shadow); }
.notice-panel ul { color: var(--muted); display: grid; gap: 10px; }
.compliance-section { padding-top: 30px; }
.compliance-grid { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 34px; border: 1px solid rgba(199,139,255,.25); border-radius: 22px; background: radial-gradient(circle at 10% 0, rgba(169,107,255,.18), transparent 44%), #0D0918; }
.compliance-grid > div { max-width: 830px; }
.compliance-grid p { color: var(--muted); margin-bottom: 0; }

/* 首页 */
.home-hero { position: relative; overflow: hidden; }
.home-hero::after { content: ''; position: absolute; width: 420px; height: 420px; right: -190px; top: 20px; border: 1px solid rgba(199,139,255,.15); border-radius: 50%; box-shadow: 0 0 120px rgba(122,43,255,.18); }
.service-summary { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; margin-top: -26px; position: relative; z-index: 2; }
.summary-card { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: rgba(22,17,31,.92); box-shadow: var(--shadow); }
.summary-card h2 { font-size: 1.06rem; color: var(--text); }
.summary-card p { margin: 0; color: var(--muted); font-size: .9rem; }
.quick-grid { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 14px; }
.quick-card { padding: 20px; min-height: 168px; display: flex; flex-direction: column; }
.quick-card p { color: var(--muted); font-size: .88rem; }
.quick-card .text-link { margin-top: auto; }
.zone-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.zone-card { overflow: hidden; }
.zone-card .image-frame { border: 0; border-radius: 0; box-shadow: none; min-height: 170px; display: grid; place-items: center; padding: 10px; background: #0D0918; }
.zone-card img { width: 100%; height: 170px; object-fit: contain; }
.zone-card .zone-copy { padding: 22px; }
.zone-card p { color: var(--muted); font-size: .9rem; }
.activity-band { display: grid; grid-template-columns: minmax(0,1fr) minmax(360px,.85fr); gap: 30px; align-items: center; padding: 34px; border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(135deg, rgba(122,43,255,.11), rgba(13,9,24,.92)); }
.activity-band .image-frame { min-height: 230px; display: grid; place-items: center; padding: 10px; }
.activity-band img { max-height: 280px; object-fit: contain; }

.site-footer { margin-top: 70px; background: #05030A; color: var(--muted); border-top: 1px solid rgba(199,139,255,.12); }
.footer-grid { display: grid; grid-template-columns: 1.6fr .8fr .8fr 1.15fr; gap: 42px; padding-block: 56px; }
.site-footer h2 { font-size: 1rem; color: var(--text); text-shadow: none; }
.site-footer a:not(.logo-text) { display: block; margin: 8px 0; color: var(--muted); }
.site-footer a:hover { color: var(--title); }
.footer-brand p, .footer-alert p { font-size: .9rem; }
.footer-bottom { border-top: 1px solid rgba(199,139,255,.1); }
.footer-bottom .section-shell { min-height: 64px; display: flex; justify-content: space-between; align-items: center; gap: 20px; color: var(--quiet); font-size: .84rem; }
.mobile-bottom-nav { display: none; }

.contact-box { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.contact-item { padding: 26px; border-radius: 18px; border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.contact-item p { color: var(--muted); }

@media (max-width: 1080px) {
    .header-shell { gap: 12px; }
    .nav-core { gap: 2px; }
    .nav-core a { padding-inline: 8px; font-size: .88rem; }
    .feature-grid.four, .zone-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .quick-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 980px) {
    :root { --header-h: 70px; --channel-h: 0px; }
    body { padding-top: var(--header-h); }
    .header-shell { width: min(100% - 24px, 760px); grid-template-columns: 44px 1fr auto; gap: 10px; }
    .menu-toggle { display: block; }
    .header-shell > .logo-text { justify-self: center; font-size: 25px; }
    .nav-core, .channel-nav { display: none; }
    .header-action { justify-self: end; }
    .main-btn.compact { min-height: 40px; padding-inline: 18px; }
    .page-hero { min-height: auto; grid-template-columns: 1fr; padding-top: 62px; gap: 34px; }
    .hero-media { max-width: 720px; width: 100%; margin: 0 auto; }
    .split-panel, .activity-band { grid-template-columns: 1fr; }
    .split-panel.reverse .copy-panel, .split-panel.reverse .content-image-frame { order: initial; }
    .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .service-summary { grid-template-columns: repeat(2, minmax(0,1fr)); margin-top: 0; padding-top: 28px; }
    .notice-panel { grid-template-columns: 1fr; gap: 12px; }
    .compliance-grid { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 700px) {
    body { padding-bottom: calc(76px + env(safe-area-inset-bottom)); }
    .section-shell, .narrow-shell { width: min(100% - 24px, 620px); }
    .content-section { padding: 54px 0; }
    h1 { font-size: clamp(2.15rem, 11vw, 3.3rem); }
    h2 { font-size: clamp(1.55rem, 7vw, 2.1rem); }
    .page-hero { padding-top: 46px; }
    .hero-copy p { font-size: .98rem; }
    .hero-image-frame { min-height: 210px; padding: 10px; }
    .hero-image-frame img { max-height: 260px; }
    .feature-grid.four, .feature-grid.three, .zone-grid, .review-grid, .steps-grid, .quick-grid, .service-summary, .contact-box { grid-template-columns: 1fr; }
    .info-card { min-height: auto; }
    .quick-card { min-height: 145px; }
    .content-image-frame { min-height: 190px; }
    .content-image-frame img { max-height: 230px; }
    .activity-band { padding: 22px; }
    .activity-band .image-frame { min-height: 180px; }
    .footer-grid { grid-template-columns: 1fr; gap: 26px; padding-block: 44px; }
    .footer-bottom .section-shell { min-height: 78px; flex-direction: column; justify-content: center; gap: 4px; text-align: center; }
    .mobile-bottom-nav { position: fixed; z-index: 900; inset: auto 10px calc(8px + env(safe-area-inset-bottom)) 10px; min-height: 60px; display: grid; grid-template-columns: repeat(4, 1fr); padding: 6px; border: 1px solid rgba(199,139,255,.22); border-radius: 18px; background: rgba(13,9,24,.95); backdrop-filter: blur(14px); box-shadow: 0 16px 40px rgba(0,0,0,.55); }
    .mobile-bottom-nav a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--muted); font-size: .75rem; border-radius: 12px; }
    .mobile-bottom-nav a span { font-size: .98rem; color: var(--quiet); line-height: 1; }
    .mobile-bottom-nav a.active, .mobile-bottom-nav a:hover { color: var(--title); background: rgba(199,139,255,.1); }
    .mobile-bottom-nav a.active span, .mobile-bottom-nav a:hover span { color: var(--title); }
}

@media (max-width: 380px) {
    .header-shell > .logo-text { font-size: 21px; letter-spacing: 1px; }
    .main-btn.compact { padding-inline: 14px; }
    .menu-toggle { width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
    * { scroll-behavior: auto !important; transition: none !important; }
}