/* ============================================================
   大盆文化 DAPEN — Design System
   电影级暗色 · 暗金点缀 · 克制高级
   ============================================================ */

:root{
  --bg:#060606;
  --bg-2:#0d0d0d;
  --bg-3:#141414;
  --gold:#C9A227;
  --gold-2:#E8C96A;
  --bronze:#B87333;
  --red:#C41E3A;
  --text:#EDEAE3;
  --text-2:#9B978C;
  --text-3:#6b675e;
  --line:rgba(237,234,227,.1);
  --line-2:rgba(237,234,227,.18);
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC","STSong",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:"SF Mono","JetBrains Mono",Consolas,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --pad:clamp(20px,5vw,80px);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:auto}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-stopped{overflow:hidden}

body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

::selection{background:var(--gold);color:#0a0a0a}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;background:none;border:none;color:inherit}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-thumb{background:var(--gold);border-radius:4px}
::-webkit-scrollbar-track{background:#0a0a0a}

/* ============ 自定义光标 ============ */
@media (pointer:fine){
  .cursor-dot,.cursor-ring{position:fixed;top:0;left:0;pointer-events:none;z-index:9999;border-radius:50%;transform:translate(-50%,-50%)}
  .cursor-dot{width:6px;height:6px;background:var(--gold);mix-blend-mode:difference}
  .cursor-ring{width:38px;height:38px;border:1px solid rgba(201,162,39,.55);transition:width .35s var(--ease),height .35s var(--ease),border-color .35s,background .35s}
  .cursor-ring.is-hover{width:62px;height:62px;background:rgba(201,162,39,.08);border-color:var(--gold)}
  .cursor-ring.is-play{width:84px;height:84px;background:rgba(201,162,39,.9)}
  .cursor-ring.is-play::after{content:"▶";position:absolute;inset:0;display:grid;place-items:center;color:#0a0a0a;font-size:14px;margin-left:3px}
}
@media (pointer:coarse){.cursor-dot,.cursor-ring{display:none}}

/* ============ 滚动进度 ============ */
.progress-wrap{position:fixed;top:0;left:0;width:100%;height:2px;z-index:1001;background:transparent}
#progressBar{height:100%;width:0;background:linear-gradient(90deg,var(--bronze),var(--gold),var(--gold-2));transform-origin:left}

/* ============ 预加载 ============ */
#preloader{position:fixed;inset:0;z-index:2000;background:#050505;display:flex;align-items:center;justify-content:center}
.pre-inner{text-align:center}
.pre-brand{font-family:var(--serif);font-size:clamp(28px,5vw,52px);letter-spacing:.12em;color:var(--text)}
.pre-brand .pre-en{display:block;font-family:var(--sans);font-size:clamp(11px,1.4vw,15px);letter-spacing:.6em;color:var(--gold);margin-top:14px;text-transform:uppercase}
.pre-track{width:min(320px,60vw);height:1px;background:var(--line);margin:36px auto 14px;overflow:hidden}
.pre-fill{height:100%;width:0;background:var(--gold)}
.pre-count{font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--text-2)}

/* ============ 导航 ============ */
.nav{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--pad);
  transition:padding .5s var(--ease),background .5s,backdrop-filter .5s;
}
.nav.is-scrolled{padding:14px var(--pad);background:rgba(6,6,6,.72);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:baseline;gap:12px}
.brand-cn{font-family:var(--serif);font-size:22px;letter-spacing:.18em;color:var(--text)}
.brand-en{font-family:var(--sans);font-size:11px;letter-spacing:.55em;color:var(--gold);text-transform:uppercase}
.nav-links{display:flex;gap:clamp(20px,3vw,44px)}
.nav-link{position:relative;font-size:14px;letter-spacing:.12em;color:var(--text-2);padding:6px 2px;transition:color .3s}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--gold);transform:scaleX(0);transform-origin:right;transition:transform .45s var(--ease)}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1);transform-origin:left}
.nav-right{display:flex;align-items:center;gap:22px}
.btn-ghost{font-size:13px;letter-spacing:.14em;color:var(--text-2);border:1px solid var(--line-2);padding:10px 22px;border-radius:100px;transition:all .4s var(--ease)}
.btn-ghost:hover{color:#0a0a0a;background:var(--text);border-color:var(--text)}
.menu-btn{display:flex;flex-direction:column;gap:6px;padding:6px;z-index:1002}
.menu-btn span{display:block;width:26px;height:1.5px;background:var(--text);transition:transform .45s var(--ease),opacity .3s}
.menu-btn.is-open span:nth-child(1){transform:translateY(3.75px) rotate(45deg)}
.menu-btn.is-open span:nth-child(2){transform:translateY(-3.75px) rotate(-45deg)}

/* ============ 全屏菜单 ============ */
.menu-overlay{position:fixed;inset:0;z-index:1001;visibility:hidden;pointer-events:none}
.menu-bg{position:absolute;inset:0;background:rgba(6,6,6,.97);clip-path:circle(0 at calc(100% - 64px) 52px);transition:clip-path .9s var(--ease)}
.menu-overlay.is-open{visibility:visible;pointer-events:auto}
.menu-overlay.is-open .menu-bg{clip-path:circle(150% at calc(100% - 64px) 52px)}
.menu-nav{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;padding:0 var(--pad);gap:6px;opacity:0;transform:translateY(24px);transition:opacity .5s .35s,transform .7s var(--ease) .35s}
.menu-overlay.is-open .menu-nav{opacity:1;transform:none}
.menu-link{position:relative;display:flex;align-items:baseline;gap:22px;width:fit-content;padding:10px 0;font-family:var(--serif);font-size:clamp(30px,6vw,54px);letter-spacing:.08em;color:var(--text);transition:color .35s}
.menu-link .menu-idx{font-family:var(--mono);font-size:12px;color:var(--gold);letter-spacing:.2em}
.menu-link:hover{color:var(--gold)}
.menu-foot{position:absolute;bottom:0;left:0;width:100%;display:flex;justify-content:space-between;padding:26px var(--pad);font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--text-3);border-top:1px solid var(--line);opacity:0;transition:opacity .5s .5s}
.menu-overlay.is-open .menu-foot{opacity:1}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;gap:12px;padding:16px 34px;border-radius:100px;font-size:14px;letter-spacing:.16em;position:relative;overflow:hidden;transition:transform .4s var(--ease),color .4s,border-color .4s}
.btn-gold{background:var(--gold);color:#0a0a0a;font-weight:500}
.btn-gold::before{content:"";position:absolute;inset:0;background:var(--gold-2);transform:translateY(101%);transition:transform .45s var(--ease);z-index:0}
.btn-gold:hover::before{transform:translateY(0)}
.btn-gold span{position:relative;z-index:1}
.btn-outline{border:1px solid var(--line-2);color:var(--text)}
.btn-outline:hover{border-color:var(--gold);color:var(--gold)}
.btn-lg{padding:20px 44px;font-size:15px}
.btn-arrow{transition:transform .4s var(--ease)}
.btn:hover .btn-arrow{transform:translateX(6px)}

/* ============ 通用板块 ============ */
section{position:relative}
.section-head{max-width:1200px;margin:0 auto;padding:clamp(90px,12vw,160px) var(--pad) 0}
.section-kicker{font-family:var(--mono);font-size:12px;letter-spacing:.35em;color:var(--gold);margin-bottom:26px;text-transform:uppercase}
.section-title{font-family:var(--serif);font-size:clamp(34px,5.4vw,68px);font-weight:500;line-height:1.22;letter-spacing:.04em}
.section-desc{max-width:560px;margin-top:30px;color:var(--text-2);font-size:clamp(15px,1.4vw,17px);line-height:1.9}
.section-title .reveal-line{display:block;overflow:hidden}
.line-inner{display:block;transform:translateY(110%)}
.voice-title-en,.ai-title-en,.about-en{display:block;font-family:var(--mono);font-size:clamp(11px,1.3vw,14px);letter-spacing:.5em;color:var(--gold);margin-top:18px;text-transform:uppercase;font-weight:400}

/* ============ HERO ============ */
.hero{height:100svh;min-height:640px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-media{position:absolute;inset:0}
.hero-video{width:100%;height:100%;object-fit:cover;transform:scale(1.08)}
.hero-veil{position:absolute;inset:0;background:
  radial-gradient(120% 90% at 50% 40%,transparent 40%,rgba(6,6,6,.55) 78%,rgba(6,6,6,.94) 100%),
  linear-gradient(180deg,rgba(6,6,6,.42) 0%,transparent 30%,transparent 62%,rgba(6,6,6,.96) 100%)}
.hero-grain{position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:4px 4px;animation:grainShift 8s steps(10) infinite}
@keyframes grainShift{0%,100%{transform:translate(0,0)}20%{transform:translate(-2%,1%)}40%{transform:translate(1%,-2%)}60%{transform:translate(-1%,2%)}80%{transform:translate(2%,1%)}}
.hero-content{position:relative;z-index:2;text-align:center;padding:0 var(--pad)}
.hero-kicker{font-family:var(--mono);font-size:clamp(10px,1.1vw,13px);letter-spacing:.5em;color:var(--gold);margin-bottom:clamp(20px,3vh,36px);overflow:hidden}
.hero-kicker span{display:block;transform:translateY(110%)}
.hero-title{font-family:var(--serif);font-weight:500;line-height:1.06;overflow:hidden;font-size:clamp(64px,15vw,190px);letter-spacing:.06em;color:var(--text);text-shadow:0 4px 40px rgba(0,0,0,.45)}
.hero-sub{margin-top:clamp(20px,3.4vh,40px);font-size:clamp(15px,1.8vw,21px);letter-spacing:.1em;color:rgba(237,234,227,.88);font-weight:300}
.hero-sub-row{display:block;overflow:hidden}
.hero-actions{margin-top:clamp(30px,5vh,56px);display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3;display:flex;flex-direction:column;align-items:center;gap:12px}
.scroll-hint-text{font-family:var(--mono);font-size:10px;letter-spacing:.5em;color:var(--text-2)}
.scroll-hint-line{width:1px;height:56px;background:linear-gradient(180deg,var(--gold),transparent);animation:scrollPulse 2.2s var(--ease) infinite;transform-origin:top}
@keyframes scrollPulse{0%{transform:scaleY(0)}45%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}
.hero-meta{position:absolute;bottom:32px;left:var(--pad);z-index:3;display:flex;gap:26px;font-family:var(--mono);font-size:10px;letter-spacing:.4em;color:var(--text-3)}
@media (max-width:768px){.hero-meta{display:none}}

/* ============ MARQUEE ============ */
.marquee{overflow:hidden;padding:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2)}
.marquee-track{display:flex;width:max-content;animation:marquee 26s linear infinite}
.marquee-track:hover{animation-play-state:paused}
.marquee-group{display:flex;align-items:center;gap:52px;padding-right:52px;flex-shrink:0}
.marquee-group span{font-family:var(--serif);font-size:clamp(18px,2.2vw,26px);letter-spacing:.22em;color:var(--text-2);white-space:nowrap}
.marquee-group i{color:var(--gold);font-size:14px;font-style:normal}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ============ 业务总览 ============ */
.biz-grid{max-width:1200px;margin:clamp(50px,7vw,90px) auto 0;padding:0 var(--pad) clamp(80px,10vw,140px);display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.biz-card{position:relative;border-radius:18px;overflow:hidden;background:var(--bg-3);border:1px solid var(--line);min-height:420px;display:flex;flex-direction:column;justify-content:flex-end;transition:border-color .5s,transform .6s var(--ease)}
.biz-card:hover{border-color:rgba(201,162,39,.45);transform:translateY(-8px)}
.biz-media{position:absolute;inset:0}
.biz-media video{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .8s ease}
.biz-card:hover .biz-media video{opacity:1}
.biz-media-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,6,6,.15),rgba(6,6,6,.92) 78%)}
.biz-body{position:relative;z-index:2;padding:30px;transform:translateY(0);transition:transform .6s var(--ease)}
.biz-num{font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--gold);display:block;margin-bottom:14px}
.biz-body h3{font-family:var(--serif);font-size:clamp(22px,2vw,28px);font-weight:500;letter-spacing:.06em;margin-bottom:10px}
.biz-body p{color:var(--text-2);font-size:14px;line-height:1.8}
.biz-more{display:inline-block;margin-top:18px;font-size:13px;letter-spacing:.16em;color:var(--text-3);transition:color .4s}
.biz-card:hover .biz-more{color:var(--gold)}
.biz-wave{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:8px;background:radial-gradient(80% 80% at 50% 60%,#1a1a1a,var(--bg-3))}
.biz-wave span{width:4px;height:40%;background:var(--gold);opacity:.35;border-radius:4px;animation:wave 1.4s ease-in-out infinite}
.biz-wave span:nth-child(2n){animation-delay:.2s}
.biz-wave span:nth-child(3n){animation-delay:.4s}
.biz-wave span:nth-child(4n){animation-delay:.1s}
.biz-wave span:nth-child(5n){animation-delay:.3s}
@keyframes wave{0%,100%{transform:scaleY(.35)}50%{transform:scaleY(1)}}

/* ============ 视频背景板块（通用） ============ */
.ai-film,.platform{min-height:100svh;display:flex;align-items:center;overflow:hidden}
.ai-bg,.pf-bg{position:absolute;inset:0}
.ai-bg video,.pf-bg video{width:100%;height:100%;object-fit:cover;transform:scale(1.06)}
.ai-veil,.pf-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,6,6,.94) 0%,rgba(6,6,6,.72) 45%,rgba(6,6,6,.5) 100%)}
.ai-content,.pf-content{position:relative;z-index:2;width:100%;max-width:1200px;margin:0 auto;padding:clamp(100px,14vh,180px) var(--pad)}
.ai-title,.pf-title{font-family:var(--serif);font-size:clamp(38px,6vw,80px);font-weight:500;line-height:1.15;letter-spacing:.05em;margin-bottom:clamp(28px,4vw,48px)}
.ai-cols{display:grid;grid-template-columns:1fr 1.25fr;gap:clamp(30px,4vw,70px)}
.ai-copy p,.pf-desc{color:var(--text-2);font-size:clamp(15px,1.4vw,17px);line-height:2;max-width:420px}
.ai-services,.voice-list{display:flex;flex-direction:column}
.service-row{display:flex;align-items:center;gap:22px;padding:22px 8px;border-top:1px solid var(--line);transition:background .4s,padding .4s var(--ease);cursor:default}
.service-row:last-child{border-bottom:1px solid var(--line)}
.service-row:hover{background:rgba(237,234,227,.04);padding-left:18px}
.service-idx{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--gold);flex-shrink:0}
.service-info h4{font-family:var(--serif);font-size:clamp(17px,1.6vw,21px);font-weight:500;letter-spacing:.05em}
.service-info p{color:var(--text-3);font-size:13px;margin-top:4px}
.service-arrow{color:var(--text-3);margin-left:auto;transition:color .4s,transform .4s var(--ease)}
.service-row:hover .service-arrow{color:var(--gold);transform:translateX(6px)}

/* ============ 统计数字 ============ */
.ai-stats,.voice-stats{display:flex;gap:clamp(34px,5vw,90px);margin-top:clamp(50px,7vw,90px)}
.stat{position:relative}
.stat-num{font-family:var(--serif);font-size:clamp(40px,5vw,64px);font-weight:500;color:var(--text);letter-spacing:.02em}
.stat-suffix{font-family:var(--serif);font-size:clamp(20px,2.4vw,30px);color:var(--gold);margin-left:4px}
.stat p{margin-top:8px;font-size:13px;letter-spacing:.08em;color:var(--text-3)}

/* ============ 配音板块 ============ */
.voice{padding-bottom:clamp(90px,12vw,160px)}
.voice-head{max-width:1200px;margin:0 auto;padding:clamp(90px,12vw,160px) var(--pad) 0}
.voice-stage{max-width:1200px;margin:clamp(50px,7vw,90px) auto 0;padding:0 var(--pad);display:grid;grid-template-columns:1fr 1.3fr;gap:clamp(40px,6vw,90px);align-items:center}
.voice-visual{display:flex;justify-content:center}
.v-orbit{position:relative;width:clamp(220px,24vw,320px);height:clamp(220px,24vw,320px)}
.v-ring{position:absolute;border-radius:50%;border:1px solid var(--line-2)}
.v-ring-1{inset:0;border-color:rgba(201,162,39,.18)}
.v-ring-2{inset:12%;border-color:rgba(201,162,39,.32);border-style:dashed;animation:spin 24s linear infinite}
.v-ring-3{inset:24%;border-color:var(--line)}
@keyframes spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
.v-core{position:absolute;inset:32%;display:grid;place-items:center;border-radius:50%;background:radial-gradient(circle at 35% 30%,#2a2110,var(--bg-2));border:1px solid rgba(201,162,39,.5);text-align:center;font-family:var(--serif);font-size:clamp(13px,1.6vw,17px);letter-spacing:.2em;color:var(--gold);line-height:1.8;box-shadow:0 0 60px rgba(201,162,39,.12) inset}
.v-dot{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--gold);top:50%;left:50%;transform:translate(-50%,-50%) rotate(var(--a)) translateX(clamp(110px,12vw,160px))}
.v-dot::after{content:"";position:absolute;inset:-6px;border-radius:50%;border:1px solid rgba(201,162,39,.5);animation:pulse 2s ease-out infinite}
@keyframes pulse{from{transform:scale(.5);opacity:1}to{transform:scale(1.8);opacity:0}}
.voice-stats{padding:0 var(--pad);max-width:1200px;margin:clamp(50px,7vw,90px) auto 0}

/* ============ 平台板块 ============ */
.platform{min-height:100svh}
.pf-veil{background:linear-gradient(90deg,rgba(6,6,6,.95) 0%,rgba(6,6,6,.78) 50%,rgba(6,6,6,.55) 100%)}
.pf-desc{max-width:560px}
.pf-flow{display:flex;align-items:stretch;margin-top:clamp(46px,6vw,72px)}
.pf-step{flex:1;padding:26px 22px;border:1px solid var(--line);border-radius:14px;background:rgba(6,6,6,.6);backdrop-filter:blur(10px);transition:border-color .45s,transform .5s var(--ease),background .45s}
.pf-step:hover{border-color:rgba(201,162,39,.5);transform:translateY(-6px);background:rgba(20,20,20,.75)}
.pf-step-num{font-family:var(--mono);font-size:11px;letter-spacing:.25em;color:var(--gold)}
.pf-step h4{font-family:var(--serif);font-size:clamp(18px,1.8vw,24px);font-weight:500;margin:14px 0 8px;letter-spacing:.08em}
.pf-step p{font-size:13px;color:var(--text-3);line-height:1.7}
.pf-connector{width:26px;position:relative;flex-shrink:0}
.pf-connector::before{content:"";position:absolute;top:50%;left:0;width:100%;height:1px;background:var(--line-2)}
.pf-connector::after{content:"→";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:var(--gold);font-size:12px}
.pf-tech{display:flex;align-items:flex-start;gap:22px;margin-top:clamp(40px,5vw,60px);padding:28px 30px;border:1px solid rgba(201,162,39,.25);border-radius:16px;background:rgba(10,10,10,.55);backdrop-filter:blur(10px);max-width:640px}
.pf-tech-tag{font-family:var(--mono);font-size:11px;letter-spacing:.25em;color:var(--gold);border:1px solid rgba(201,162,39,.4);padding:6px 14px;border-radius:100px;flex-shrink:0;margin-top:4px}
.pf-tech-body h4{font-family:var(--serif);font-size:clamp(17px,1.6vw,21px);font-weight:500;margin-bottom:8px;letter-spacing:.05em}
.pf-tech-body p{font-size:14px;color:var(--text-2);line-height:1.9}

/* ============ 作品 ============ */
.works-list{max-width:1200px;margin:clamp(50px,7vw,90px) auto 0;padding:0 var(--pad)}
.work-item{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(24px,3vw,50px);align-items:center;padding:clamp(30px,4vw,54px) 0;border-top:1px solid var(--line);cursor:pointer}
.work-item:last-of-type{border-bottom:1px solid var(--line)}
.work-thumb{position:relative;border-radius:16px;overflow:hidden;aspect-ratio:16/9;background:var(--bg-3)}
.work-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease),opacity .5s}
.work-item:hover .work-thumb img{transform:scale(1.06)}
.work-play{position:absolute;inset:0;display:grid;place-items:center;background:rgba(6,6,6,.32);opacity:0;transition:opacity .5s}
.work-item:hover .work-play{opacity:1}
.work-play span{width:74px;height:74px;border-radius:50%;background:rgba(201,162,39,.92);color:#0a0a0a;display:grid;place-items:center;font-size:18px;transform:scale(.8);transition:transform .5s var(--ease)}
.work-item:hover .work-play span{transform:scale(1)}
.work-meta{position:absolute;top:16px;right:16px;display:flex;gap:10px}
.work-meta span{font-family:var(--mono);font-size:10px;letter-spacing:.15em;color:var(--text);background:rgba(6,6,6,.55);backdrop-filter:blur(8px);padding:5px 12px;border-radius:100px;border:1px solid var(--line)}
.work-info .work-cat{font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--gold)}
.work-info h3{font-family:var(--serif);font-size:clamp(24px,3vw,40px);font-weight:500;margin:14px 0 10px;letter-spacing:.04em}
.work-info p{color:var(--text-2);font-size:14px}
.works-note{max-width:1200px;margin:clamp(40px,5vw,70px) auto 0;padding:0 var(--pad) clamp(90px,12vw,160px);display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.works-note p{color:var(--text-3);font-size:14px;letter-spacing:.05em}

/* ============ 关于 ============ */
.about{max-width:1200px;margin:0 auto;padding:clamp(90px,12vw,160px) var(--pad)}
.about-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:clamp(40px,6vw,90px)}
.about-right p{color:var(--text-2);font-size:clamp(15px,1.5vw,18px);line-height:2.1;margin-bottom:22px}
.about-timeline{margin-top:clamp(60px,8vw,100px);border-top:1px solid var(--line)}
.tl-item{display:grid;grid-template-columns:120px 1fr;gap:26px;padding:28px 0;border-bottom:1px solid var(--line);transition:padding .45s var(--ease),background .4s}
.tl-item:hover{padding-left:14px;background:rgba(237,234,227,.03)}
.tl-year{font-family:var(--mono);font-size:13px;letter-spacing:.25em;color:var(--gold)}
.tl-body h4{font-family:var(--serif);font-size:clamp(17px,1.6vw,22px);font-weight:500;margin-bottom:6px;letter-spacing:.05em}
.tl-body p{color:var(--text-3);font-size:14px}
.about-partners{margin-top:clamp(50px,6vw,80px);display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.partner-logos{display:flex;gap:18px;flex-wrap:wrap}
.partner{font-family:var(--serif);font-size:15px;letter-spacing:.12em;color:var(--text-3);border:1px solid var(--line);padding:10px 24px;border-radius:100px;transition:all .4s}
.partner:hover{color:var(--gold);border-color:rgba(201,162,39,.5)}

/* ============ 联系 ============ */
.contact{max-width:1200px;margin:0 auto;padding:clamp(90px,12vw,160px) var(--pad)}
.contact-title{font-family:var(--serif);font-size:clamp(44px,7vw,96px);font-weight:500;line-height:1.12;letter-spacing:.05em}
.contact-desc{margin-top:28px;color:var(--text-2);font-size:clamp(15px,1.5vw,18px);max-width:520px;line-height:1.9}
.contact-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:clamp(46px,6vw,70px) 0}
.contact-card{padding:30px;border:1px solid var(--line);border-radius:16px;transition:all .5s var(--ease);display:block}
.contact-card:hover{border-color:rgba(201,162,39,.5);transform:translateY(-6px);background:rgba(237,234,227,.03)}
.cc-label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--text-3);margin-bottom:12px}
.cc-value{font-family:var(--serif);font-size:clamp(17px,1.7vw,22px);letter-spacing:.03em;color:var(--text)}

/* ============ FOOTER ============ */
.footer{border-top:1px solid var(--line);padding:clamp(50px,6vw,80px) var(--pad) 30px;background:var(--bg-2)}
.footer-top{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap}
.footer-brand .brand-cn{font-size:30px}
.footer-brand .brand-en{display:block;font-size:10px;letter-spacing:.6em;margin-top:10px}
.footer-nav{display:flex;gap:26px;flex-wrap:wrap}
.footer-nav a{font-size:14px;letter-spacing:.1em;color:var(--text-2);transition:color .35s}
.footer-nav a:hover{color:var(--gold)}
.footer-bottom{max-width:1200px;margin:clamp(40px,5vw,60px) auto 0;padding-top:26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--text-3)}

/* ============ LIGHTBOX ============ */
.lightbox{position:fixed;inset:0;z-index:1500;background:rgba(3,3,3,.96);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .5s,visibility .5s}
.lightbox.is-open{opacity:1;visibility:visible}
.lb-stage{width:min(1280px,92vw);position:relative}
.lb-stage video{width:100%;max-height:82vh;background:#000;border-radius:8px;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.lb-close{position:absolute;top:26px;right:26px;width:48px;height:48px;border-radius:50%;border:1px solid var(--line-2);font-size:16px;color:var(--text);z-index:2;transition:all .4s}
.lb-close:hover{background:var(--gold);color:#0a0a0a;transform:rotate(90deg)}
.lb-loading{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.lb-loading span{width:44px;height:44px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--gold);animation:spin 1s linear infinite}
.lb-caption{position:absolute;bottom:-44px;left:0;color:var(--text-2);font-size:13px;letter-spacing:.1em}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .biz-grid{grid-template-columns:1fr}
  .biz-card{min-height:340px}
  .ai-cols,.voice-stage{grid-template-columns:1fr}
  .ai-copy p{max-width:100%}
  .pf-flow{flex-direction:column}
  .pf-connector{width:100%;height:26px}
  .pf-connector::before{top:50%;left:0;width:100%;height:1px}
  .pf-connector::after{top:50%;left:50%}
  .contact-cards{grid-template-columns:1fr}
}
@media (max-width:768px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .work-item{grid-template-columns:1fr}
  .work-info{padding:0 4px}
  .about-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:8px}
  .hero-actions{flex-direction:column;align-items:center}
  .hero-actions .btn{width:100%;justify-content:center}
  .ai-stats,.voice-stats{gap:26px;flex-wrap:wrap}
  .stat{min-width:120px}
  .menu-foot{flex-direction:column;gap:8px}
  .pf-tech{flex-direction:column;gap:16px}
  .footer-top{flex-direction:column}
  .marquee-group span{font-size:16px;letter-spacing:.14em}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}