/* ==========================================================================
   revamp.css — 2026 改版：首屏预告片、视频卡片/弹层、吸顶栏目名、
   质量问诊版块、解决方案页签、案例卡、联系、页脚、滚动动效
   品牌：深蓝 #080c18 · 青 #22d3ee · 红 #d63031（点缀）· Noto Sans SC · JetBrains Mono（数字）
   ========================================================================== */

html { overflow-x: hidden; }
body {
    background:
        radial-gradient(1200px 800px at 85% -10%, rgba(34, 211, 238, 0.07), transparent 60%),
        radial-gradient(900px 700px at -10% 40%, rgba(34, 211, 238, 0.04), transparent 60%),
        var(--color-bg-deep);
    background-attachment: fixed;
}
@media (max-width: 768px) { body::before { display: none; } body { background-attachment: scroll; } }
h1, h2, h3, h4 { letter-spacing: 0.01em; }
html[lang="en"] h1, html[lang="vi"] h1 { letter-spacing: -0.01em; }
::selection { background: rgba(34, 211, 238, 0.3); color: #fff; }
:focus-visible { outline: 2px solid var(--color-cyan); outline-offset: 3px; border-radius: 4px; }
.wx-share { display: none; }
.skip-link { position: absolute; left: 1rem; top: -3rem; z-index: 100; background: var(--color-cyan); color: var(--color-bg-deep); padding: .5rem 1rem; border-radius: 6px; font-weight: 700; }
.skip-link:focus { top: 1rem; }
.section { position: relative; }
.section-alt { background: linear-gradient(180deg, rgba(13, 20, 38, 0.0), rgba(13, 20, 38, 0.72) 12%, rgba(13, 20, 38, 0.72) 88%, rgba(13, 20, 38, 0)); }
.section-divider { display: none; }

/* --- 数字字体 --- */
.stat-num, .stat-number, .sec-num, .qf-num, .sec-pin b, .cert-count {
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-variant-numeric: tabular-nums;
}
.stat-num { display: inline-block; font-weight: 700; color: #fff; line-height: 1; }
.stat-num.bump { animation: num-bump .5s cubic-bezier(.34, 1.56, .64, 1); }
@keyframes num-bump { 0% { transform: scale(1); } 40% { transform: scale(1.08); } 100% { transform: scale(1); } }

/* --- 导航 --- */
.nav { background: linear-gradient(180deg, rgba(8, 12, 24, 0.75), rgba(8, 12, 24, 0)); }
.nav.scrolled, .nav.menu-open { background: rgba(8, 12, 24, 0.9); border-bottom: 1px solid var(--color-border); }
.nav-brand { display: inline-flex; align-items: center; gap: .6rem; font-size: 1.15rem; letter-spacing: .04em; }
.nav-brand img { width: 32px; height: 32px; }
.nav-links { gap: 1.25rem; }
@media (min-width: 1024px) and (max-width: 1180px) { .nav-links { gap: .9rem; } .nav-link { font-size: .875rem; } }
.nav-link { position: relative; }
.nav-links .nav-link.active::after { content: ''; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; border-radius: 2px; background: var(--color-cyan); }
/* 7 个栏目：平板宽度也用折叠菜单 */
@media (min-width: 768px) and (max-width: 1023px) { .nav-links { display: none; } .nav-mobile-btn { display: block; } }
.nav-mobile { background: rgba(8, 12, 24, 0.97); border-top: 1px solid var(--color-border); padding-bottom: .75rem; }

/* --- 按钮 --- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; border-radius: 999px; padding: .8rem 1.6rem; }
.btn svg { width: 1.1rem; height: 1.1rem; flex: none; }
.btn-play svg { width: 1rem; height: 1rem; }
.btn-outline { border-color: rgba(34, 211, 238, 0.55); }

/* ==================== HERO ==================== */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: center; overflow: hidden; padding: calc(var(--nav-height) + 2rem) 0 5rem; isolation: isolate; }
.hero-media { position: absolute; inset: -2px 0 0; z-index: -1; will-change: transform; }
.hero-media picture, .hero-poster, .hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-poster { display: block; }
/* 预告片作氛围底纹：轻微虚化，片中大字不与首屏标题抢视线 */
.hero-poster, .hero-video { filter: blur(3px) saturate(1.15); transform: scale(1.05); }
.hero-video { opacity: 0; transition: opacity 1.2s ease; }
.hero-video.is-playing { opacity: 1; }
.hero-scrim { position: absolute; inset: 0;
    background:
        linear-gradient(90deg, rgba(8, 12, 24, 0.95) 0%, rgba(8, 12, 24, 0.86) 40%, rgba(8, 12, 24, 0.55) 72%, rgba(8, 12, 24, 0.6) 100%),
        linear-gradient(180deg, rgba(8, 12, 24, 0.5) 0%, rgba(8, 12, 24, 0) 25%, rgba(8, 12, 24, 0) 70%, var(--color-bg-deep) 100%); }
.hero-inner { position: relative; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: .6rem; padding: .35rem .9rem; border: 1px solid rgba(148, 163, 184, 0.22); border-radius: 999px; background: rgba(8, 12, 24, 0.5); backdrop-filter: blur(6px); font-size: .85rem; color: var(--color-text); }
.hero-eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-red); box-shadow: 0 0 0 4px rgba(214, 48, 49, 0.18); }
.hero-title { margin-top: 1.5rem; font-size: clamp(2.75rem, 7.2vw, 5.75rem); font-weight: 700; line-height: 1.08; max-width: 12em; text-wrap: balance; }
.hero-hl { background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
html[lang="zh-CN"] .t-gap { display: none; }
.hero-motto { display: flex; align-items: center; gap: .9rem; margin-top: 1.25rem; font-size: clamp(1.15rem, 2.2vw, 1.6rem); font-weight: 700; color: #e0f7fb; letter-spacing: .02em; }
html[lang="zh-CN"] .hero-motto { letter-spacing: .12em; }
.hero-motto-bar { width: 2.5rem; height: 3px; border-radius: 2px; background: linear-gradient(90deg, var(--color-red), rgba(214, 48, 49, 0)); }
.hero-desc { margin-top: 1.25rem; max-width: 36rem; color: var(--color-text-dim); font-size: 1.05rem; line-height: 1.8; }
.hero-cta { margin-top: 2.25rem; display: flex; flex-wrap: wrap; gap: .9rem; }
.hero-stats { margin-top: 3.5rem; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 46rem; border-top: 1px solid rgba(148, 163, 184, 0.18); }
.hero-stat { padding: 1.1rem 1rem 0 0; display: flex; flex-direction: column; gap: .45rem; }
.hero-stat + .hero-stat { padding-left: 1.25rem; border-left: 1px solid rgba(148, 163, 184, 0.12); }
.hero-stat .stat-num { font-size: clamp(1.9rem, 3.4vw, 2.6rem); color: #fff; }
.hero-stat .stat-label { font-size: .85rem; color: var(--color-text-dim); }
.hero-scroll { position: absolute; left: 50%; bottom: 1.5rem; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: .5rem; font-size: .72rem; letter-spacing: .2em; color: var(--color-text-dim); }
.hero-scroll i { width: 1px; height: 2.25rem; background: linear-gradient(180deg, var(--color-cyan), transparent); animation: scroll-cue 2.2s ease-in-out infinite; transform-origin: top; }
@keyframes scroll-cue { 0% { transform: scaleY(0); opacity: 0; } 30% { opacity: 1; } 100% { transform: scaleY(1); opacity: 0; } }
@media (max-width: 767px) {
    .hero { align-items: flex-end; padding-bottom: 4.5rem; }
    .hero-scrim { background: linear-gradient(180deg, rgba(8, 12, 24, 0.6) 0%, rgba(8, 12, 24, 0.3) 18%, rgba(8, 12, 24, 0.82) 42%, rgba(8, 12, 24, 0.97) 64%, var(--color-bg-deep) 100%); }
    .hero-title { font-size: clamp(2.5rem, 12vw, 3.4rem); }
    .hero-poster, .hero-video { filter: blur(5px) saturate(1.15); transform: scale(1.08); }
    .hero-desc { font-size: .98rem; }
    .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 2.25rem; }
    .hero-stat:nth-child(3) { padding-left: 0; border-left: 0; }
    .hero-stat:nth-child(n+3) { border-top: 1px solid rgba(148, 163, 184, 0.12); margin-top: .9rem; }
    .hero-scroll { display: none; }
    .hero-cta .btn { flex: 1 1 auto; }
}

/* ==================== 栏目标题 + 吸顶栏目名 ==================== */
.section-header { margin-bottom: 3.5rem; }
.section-label { display: inline-flex; align-items: center; gap: .6rem; text-transform: none; letter-spacing: .08em; }
.sec-num { font-size: .78rem; color: var(--color-text-dim); padding-right: .6rem; border-right: 2px solid var(--color-red); line-height: 1; }
.section-subtitle { max-width: 44rem; margin-left: auto; margin-right: auto; line-height: 1.8; }
.sec-pin { position: sticky; top: var(--nav-height); height: 0; z-index: 20; pointer-events: none; }
.sec-pin-inner { position: absolute; left: max(1rem, calc((100vw - var(--max-width)) / 2 + 2rem)); top: .6rem; display: inline-flex; align-items: center; gap: .55rem; padding: .3rem .85rem .3rem .65rem; font-size: .8rem; color: var(--color-text); background: rgba(8, 12, 24, 0.78); border: 1px solid var(--color-border); border-radius: 999px; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); opacity: 0; transform: translateY(-6px); transition: opacity .3s ease, transform .3s ease; }
.sec-pin b { font-size: .72rem; color: var(--color-cyan); font-weight: 700; }
.section.pinned .sec-pin-inner { opacity: 1; transform: none; }
@media (max-width: 1023px) { .sec-pin { display: none; } }

/* ==================== 关于 + 视频卡片 ==================== */
.about-grid { display: grid; gap: 2.5rem; align-items: center; }
@media (min-width: 1024px) { .about-grid { grid-template-columns: 1.05fr 1fr; gap: 4rem; } }
.vcard { position: relative; display: block; width: 100%; aspect-ratio: 16 / 9; border-radius: 1rem; overflow: hidden; border: 1px solid rgba(34, 211, 238, 0.22); background: #050810; box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.02) inset; cursor: pointer; text-align: left; }
.vcard img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2, .7, .2, 1), filter .4s; filter: saturate(1.05); }
.vcard::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8, 12, 24, 0) 62%, rgba(8, 12, 24, 0.9) 100%); pointer-events: none; }
.vcard:hover img { transform: scale(1.035); }
.vcard-play { position: absolute; left: 1.25rem; bottom: 1.1rem; z-index: 2; width: 3.4rem; height: 3.4rem; border-radius: 50%; display: grid; place-items: center; color: var(--color-bg-deep); background: var(--color-cyan); box-shadow: 0 0 0 7px rgba(34, 211, 238, 0.16), 0 8px 24px rgba(34, 211, 238, 0.35); transition: transform .3s ease, box-shadow .3s ease; }
.vcard-play svg { width: 1.3rem; height: 1.3rem; margin-left: 3px; }
.vcard:hover .vcard-play { transform: scale(1.08); box-shadow: 0 0 0 12px rgba(34, 211, 238, 0.12), 0 10px 32px rgba(34, 211, 238, 0.45); }
.vcard-cap { position: absolute; left: 5.4rem; right: 1.25rem; bottom: 1.15rem; z-index: 2; display: flex; flex-direction: column; gap: .15rem; }
.vcard-cap strong { color: #fff; font-size: 1.05rem; }
.vcard-cap em { font-style: normal; font-size: .82rem; color: var(--color-text-dim); font-family: 'JetBrains Mono', ui-monospace, monospace; }

/* ==================== 视频弹层 ==================== */
.vmodal { position: fixed; inset: 0; z-index: 1100; display: grid; place-items: center; padding: 1.25rem; }
.vmodal[hidden] { display: none; }
.vmodal-backdrop { position: absolute; inset: 0; background: rgba(3, 5, 10, 0.88); backdrop-filter: blur(6px); opacity: 0; transition: opacity .3s; }
.vmodal.open .vmodal-backdrop { opacity: 1; }
.vmodal-box { position: relative; width: min(1200px, 100%, calc((100vh - 7rem) * 16 / 9)); aspect-ratio: 16 / 9; border-radius: .9rem; overflow: visible; transform: scale(.97); opacity: 0; transition: transform .35s cubic-bezier(.2, .7, .2, 1), opacity .3s; }
.vmodal.open .vmodal-box { transform: none; opacity: 1; }
.vmodal.is-portrait .vmodal-box { width: min(100%, calc((100vh - 6rem) * 9 / 16)); width: min(100%, calc((100svh - 6rem) * 9 / 16)); aspect-ratio: 9 / 16; }
.vmodal video { width: 100%; height: 100%; display: block; border-radius: .9rem; background: #000; box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.9); }
.vmodal-close { position: absolute; right: 0; top: -3rem; width: 2.5rem; height: 2.5rem; border-radius: 50%; font-size: 1.6rem; line-height: 1; color: #fff; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); }
.vmodal-close:hover { background: rgba(255, 255, 255, 0.2); }
body.film-open { overflow: hidden; }

/* ==================== 产品架构图：小屏可横向滑动 ==================== */
@media (max-width: 767px) {
    .arch-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -1rem; padding: 0 1rem .5rem; }
    .arch-scroll .arch-diagram { min-width: 900px; }
}

/* ==================== 质量问诊智能体 ==================== */
.quality-hero { display: grid; gap: 2.5rem; align-items: center; }
@media (min-width: 1024px) { .quality-hero { grid-template-columns: 1.25fr 1fr; gap: 3.5rem; } }
.qf-grid { margin-top: 4rem; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .qf-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1200px) { .qf-grid { grid-template-columns: repeat(4, 1fr); } }
.qf { display: flex; flex-direction: column; }
.qf-shot { aspect-ratio: 16 / 10; overflow: hidden; background: #0b1222; border-bottom: 1px solid var(--color-border); }
.qf-shot img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .8s cubic-bezier(.2, .7, .2, 1); }
.qf:hover .qf-shot img { transform: scale(1.04); }
.qf-body { padding: 1.25rem 1.25rem 1.4rem; }
.qf-num { display: block; font-size: .75rem; color: var(--color-cyan); margin-bottom: .35rem; letter-spacing: .1em; }
.qf-body h4 { font-size: 1.1rem; margin-bottom: .4rem; }
.quality-note { margin-top: 2rem; text-align: center; font-size: .85rem; color: var(--color-text-dim); letter-spacing: .04em; }

/* ==================== 解决方案页签 ==================== */
.sol-tabs { display: flex; justify-content: center; gap: .5rem; margin: 0 auto 2.5rem; padding: .35rem; width: fit-content; max-width: 100%; border: 1px solid var(--color-border); border-radius: 999px; background: rgba(8, 12, 24, 0.5); overflow-x: auto; scrollbar-width: none; }
.sol-tabs::-webkit-scrollbar { display: none; }
.sol-tab { flex: none; padding: .55rem 1.35rem; border-radius: 999px; font-size: .95rem; color: var(--color-text-dim); transition: color .2s, background .2s; white-space: nowrap; }
.sol-tab:hover { color: #fff; }
.sol-tab.active { color: var(--color-bg-deep); background: var(--color-cyan); font-weight: 700; }
.js .sol-panel { display: none; }
.js .sol-panel.active { display: block; animation: panel-in .45s ease both; }
@keyframes panel-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.sol-block { display: grid; gap: 1.5rem; padding: 2rem 0; border-top: 1px solid var(--color-border); }
.sol-panel > .sol-block:first-child { border-top: 0; padding-top: .5rem; }
@media (min-width: 1024px) { .sol-block { grid-template-columns: 19rem 1fr; gap: 3rem; } }
.sol-block-head h3 { font-size: 1.35rem; margin-bottom: .6rem; }
.sol-block-head p { line-height: 1.75; }
.sol-card { padding: 1.25rem 1.35rem; }
.sol-card h4 { font-size: 1.02rem; margin-bottom: .45rem; }
.sol-card p { line-height: 1.7; }
.sol-mfg .product-diagram { max-width: 420px; margin: 0 auto 1.25rem; }
.sol-link { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1.25rem; color: var(--color-cyan); font-weight: 600; }
.sol-link span { transition: transform .2s; }
.sol-link:hover span { transform: translateX(4px); }

/* ==================== 案例卡（统一格式） ==================== */
.case-card { padding: 1.4rem 1.5rem 1.5rem; display: flex; flex-direction: column; gap: .65rem; }
.case-top { display: flex; justify-content: space-between; align-items: center; gap: .75rem; }
.case-tag { font-size: .75rem; font-weight: 600; color: var(--color-cyan); padding: .15rem .6rem; border-radius: 999px; background: rgba(34, 211, 238, 0.08); border: 1px solid rgba(34, 211, 238, 0.2); }
.cat-dev .case-tag { color: var(--color-purple); background: rgba(167, 139, 250, 0.08); border-color: rgba(167, 139, 250, 0.22); }
.cat-rpa .case-tag { color: #cbd5e1; background: rgba(148, 163, 184, 0.08); border-color: rgba(148, 163, 184, 0.22); }
.case-card h4 { font-size: 1.08rem; line-height: 1.4; }
.case-card p { line-height: 1.7; }
.cases-summary { margin-top: 3rem; display: flex; align-items: baseline; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.cases-summary .stat-num { font-size: 2.75rem; color: var(--color-cyan); }

/* ==================== 证书 ==================== */
.cert-card { padding: 0; font: inherit; color: inherit; text-align: center; display: block; }
.cert-card img { background: rgba(255, 255, 255, 0.03); }
.cert-label { display: block; }
.cert-arrow { background: rgba(8, 12, 24, 0.9); }
@media (max-width: 767px) { .cert-arrow { display: none; } .cert-card { flex-basis: 44vw; } }

/* ==================== 联系 ==================== */
.contact-panel { position: relative; display: grid; gap: 2.5rem; padding: clamp(2rem, 5vw, 4rem); border-radius: 1.5rem; border: 1px solid rgba(34, 211, 238, 0.2); overflow: hidden;
    background: radial-gradient(600px 300px at 0% 0%, rgba(34, 211, 238, 0.12), transparent 70%), radial-gradient(500px 300px at 100% 100%, rgba(214, 48, 49, 0.08), transparent 70%), rgba(13, 20, 38, 0.8); }
@media (min-width: 1024px) { .contact-panel { grid-template-columns: 1.1fr 1fr; align-items: center; gap: 4rem; } }
.contact-title { margin-top: .75rem; font-size: clamp(1.75rem, 3.4vw, 2.5rem); line-height: 1.3; text-wrap: balance; }
.contact-list { list-style: none; display: grid; gap: 1rem; }
.contact-list li { display: flex; gap: 1rem; align-items: flex-start; padding: 1.1rem 1.25rem; border-radius: .9rem; background: rgba(8, 12, 24, 0.55); border: 1px solid var(--color-border); }
.contact-list svg { width: 1.4rem; height: 1.4rem; color: var(--color-cyan); flex: none; margin-top: .15rem; }
.contact-list .k { font-size: .8rem; color: var(--color-text-dim); }
.contact-list .v { color: #fff; margin-top: .15rem; overflow-wrap: anywhere; }
.contact-list a:hover { color: var(--color-cyan); }

/* ==================== 页脚 ==================== */
.footer { background: var(--color-bg-footer); border-top: 1px solid var(--color-border); padding-top: 3rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; padding-bottom: 2rem; }
.footer-brand { display: flex; gap: .85rem; align-items: center; }
.footer-brand img { width: 36px; height: 36px; }
.footer-brand strong { color: #fff; font-size: 1.05rem; letter-spacing: .04em; }
.footer-brand p { font-size: .85rem; color: var(--color-text-dim); margin-top: .1rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; align-items: center; }
.footer-nav a { font-size: .88rem; color: var(--color-text-dim); }
.footer-nav a:hover { color: var(--color-cyan); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; padding-top: 1.25rem; padding-bottom: calc(1.25rem + env(safe-area-inset-bottom)); border-top: 1px solid rgba(148, 163, 184, 0.08); }
.footer-bottom p { font-size: .8rem; color: var(--color-text-muted); }
.footer-icp:empty { display: none; }
.footer-icp a { color: var(--color-text-muted); }

/* ==================== 滚动淡入（JS 加 .reveal；无 JS / 减少动态时内容直接可见） ==================== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2, .7, .2, 1), transform .7s cubic-bezier(.2, .7, .2, 1); transition-delay: var(--d, 0ms); }
.reveal.in { opacity: 1; transform: none; }
.card.reveal.in:hover { transform: translateY(-5px); transition-delay: 0ms; }

/* ==================== 防溢出 ==================== */
.container { overflow-wrap: break-word; }
img, svg, video { max-width: 100%; }
.grid > * { min-width: 0; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
    .hero-video { display: none; }
    .reveal { opacity: 1; transform: none; }
}