/* =========================================================
   观澜堂 GUANLANTANG · 视觉系统
   设计语言：美术馆白墙 × 东方墨金
   - 底色：宣纸米白，大面积留白，让作品说话
   - 主色：墨黑 + 暖金；点缀：澜蓝（取自 Logo 海浪）
   - 重点：作品装裱感（白卡纸 + 细边 + 柔和投影）
   ========================================================= */

:root{
  /* 墨 */
  --ink:#14130f;
  --ink-2:#221f18;
  --ink-3:#3a3529;
  /* 纸 */
  --paper:#f7f4ee;
  --paper-2:#efe9dd;
  --paper-3:#e6ddcb;
  /* 金 */
  --gold:#b6874a;
  --gold-2:#d0a765;
  --gold-ink:#8a6432;      /* 纸底色上的可读金 */
  /* 澜蓝 / 黛绿 */
  --blue:#3f6f86;
  --jade:#44645a;
  --muted:#6d6659;
  --line:rgba(20,19,15,.10);
  --line-2:rgba(20,19,15,.16);
  /* 投影分两层：一层贴地勾勒轮廓，一层扩散做体积，比单层投影更"贵" */
  --shadow-s:0 1px 2px rgba(20,19,15,.05),0 4px 12px rgba(20,19,15,.06);
  --shadow-m:0 2px 6px rgba(20,19,15,.05),0 18px 40px rgba(20,19,15,.12);
  --shadow-l:0 4px 12px rgba(20,19,15,.08),0 32px 80px rgba(20,19,15,.22);
  --shadow-frame:0 1px 2px rgba(20,19,15,.06),0 10px 24px rgba(20,19,15,.10);
  --radius:6px;
  --maxw:1200px;
  --sec:clamp(64px,7.4vw,112px);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scrollbar-gutter:stable}
/* 锚点跳转时给吸顶导航让位，否则标题会被压在导航下面 */
section[id],h2[id],h3[id],div[id]{scroll-margin-top:96px}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.lock{overflow:hidden}
/* 中文标题避免行尾只剩一个字（孤字），正文避免难看的断行 */
h1,h2,h3,h4{text-wrap:balance}
p,li{text-wrap:pretty}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
::selection{background:var(--gold-2);color:var(--ink)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}
/* 桌面端滚动条：细一档，金色滑块，和整体调性一致（移动端不生效） */
@media(min-width:1024px) and (pointer:fine){
  *{scrollbar-width:thin;scrollbar-color:rgba(182,135,74,.45) transparent}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:rgba(182,135,74,.4);border-radius:999px;border:3px solid transparent;background-clip:content-box}
  ::-webkit-scrollbar-thumb:hover{background:rgba(182,135,74,.7);background-clip:content-box}
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%}
.section{padding:var(--sec) 0}
.section.tight{padding:calc(var(--sec) * .62) 0}
.path{background:var(--paper-2);position:relative}
.path:before,.path:after{content:"";position:absolute;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--line-2) 20%,var(--line-2) 80%,transparent)}
.path:before{top:0}
.path:after{bottom:0}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);padding:10px 16px;z-index:300}
.skip:focus{left:12px;top:12px}

/* ---------- 文本 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:12px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--gold-ink);font-weight:600;margin-bottom:16px;
}
.eyebrow:before{content:"";width:26px;height:1px;background:var(--gold);flex:none}
.on-dark .eyebrow{color:var(--gold-2)}
.h1{font-family:var(--serif);font-weight:700;letter-spacing:.02em;line-height:1.2}
.h2{font-family:var(--serif);font-size:clamp(26px,3.5vw,42px);line-height:1.24;font-weight:700;letter-spacing:.02em}
.h2 .en,.h1 .en{display:block;font-family:var(--sans);font-size:12px;letter-spacing:.3em;color:var(--muted);font-weight:500;margin-top:12px;text-transform:uppercase}
.h3{font-family:var(--serif);font-size:clamp(18px,1.7vw,21px);font-weight:700;letter-spacing:.01em}
/* 中文正文控制在 66 个字符宽度内，一行别超过 40 个汉字，读起来最舒服 */
.lead{color:var(--muted);font-size:clamp(15px,1.15vw,17px);max-width:min(760px,66ch);margin-top:16px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
.center .eyebrow{justify-content:center}
.muted{color:var(--muted)}
.rule{height:1px;background:linear-gradient(90deg,var(--gold),transparent);border:0;margin:28px 0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:999px;font-weight:600;font-size:15px;line-height:1;
  transition:transform .25s ease,background .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:var(--ink);color:var(--paper)}
.btn-gold:hover{background:var(--gold);color:#fff;box-shadow:0 12px 28px rgba(182,135,74,.32)}
.btn-outline{border-color:var(--line-2);color:var(--ink)}
.btn-outline:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn-ghost{border-color:rgba(182,135,74,.5);color:var(--gold-ink)}
.btn-ghost:hover{background:var(--gold);border-color:var(--gold);color:#fff}
.btn-lg{padding:17px 36px;font-size:16px}
.btn .arw{transition:transform .25s ease}
.btn:hover .arw{transform:translateX(3px)}

/* ---------- 页头导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(247,244,238,.82);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease,background .3s ease;
}
.site-header.scrolled{box-shadow:0 6px 24px rgba(20,19,15,.07);background:rgba(247,244,238,.94)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{
  width:44px;height:44px;border-radius:9px;overflow:hidden;flex:none;
  border:1px solid rgba(182,135,74,.4);background:#fbf9f4;
  box-shadow:0 2px 8px rgba(20,19,15,.10);
  transition:transform .3s ease,box-shadow .3s ease;
}
.brand:hover .brand-mark{transform:rotate(-3deg) scale(1.04);box-shadow:0 6px 16px rgba(20,19,15,.16)}
.brand-mark img{width:100%;height:100%;object-fit:cover}
.brand-txt{display:flex;flex-direction:row;align-items:baseline;gap:11px;line-height:1.1}
.brand-txt b{font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.1em;white-space:nowrap}
.brand-txt i{font-style:normal;font-size:10px;letter-spacing:.24em;color:var(--gold-ink);font-weight:600;white-space:nowrap;position:relative;padding-left:12px}
.brand-txt i:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:1px;height:11px;background:rgba(20,19,15,.18)}
.menu{display:flex;gap:4px;align-items:center;margin-left:auto}
.menu a{font-size:15px;color:var(--ink-3);padding:9px 13px;border-radius:999px;position:relative;white-space:nowrap;transition:color .2s ease,background .2s ease}
.menu a:hover{color:var(--ink);background:rgba(20,19,15,.05)}
.menu a.active{color:var(--ink);font-weight:600}
.menu a.active:after{content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:16px;height:2px;border-radius:2px;background:var(--gold)}
.nav-cta{display:flex;gap:10px;align-items:center;flex:none;margin-left:10px}
.nav-cta .btn{padding:11px 20px;font-size:14px}
.burger{display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:none;border:1px solid var(--line-2);border-radius:10px;cursor:pointer}
.burger span{width:19px;height:1.6px;background:var(--ink);transition:.3s}

/* 移动端全屏菜单 */
.nav-panel{
  position:fixed;inset:0;z-index:95;background:var(--ink);color:var(--paper);
  padding:26px 24px 40px;display:flex;flex-direction:column;
  transform:translateY(-102%);transition:transform .45s cubic-bezier(.22,.61,.36,1);
  overflow-y:auto;
}
.nav-panel.open{transform:none}
.nav-panel .p-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.nav-panel .p-brand{font-family:var(--serif);font-size:19px;letter-spacing:.1em;color:#fff}
.nav-panel .p-brand{display:flex;align-items:center;gap:11px}
.nav-panel .p-brand img{width:38px;height:38px;border-radius:8px;border:1px solid rgba(208,167,101,.42);flex:none}
.nav-panel .p-close{width:44px;height:44px;border:1px solid rgba(247,244,238,.22);border-radius:50%;background:none;cursor:pointer;font-size:17px;line-height:1}
.nav-panel a.p-link{font-family:var(--serif);font-size:clamp(22px,6.4vw,28px);padding:13px 0;border-bottom:1px solid rgba(247,244,238,.1);display:flex;justify-content:space-between;align-items:center;color:rgba(247,244,238,.92)}
.nav-panel a.p-link span{font-family:var(--sans);font-size:11px;letter-spacing:.2em;color:var(--gold-2);opacity:.8}
.nav-panel .p-foot{margin-top:auto;padding-top:26px;display:flex;flex-direction:column;gap:12px}
.nav-panel .p-foot .btn{width:100%}
.nav-panel .p-info{font-size:13px;color:rgba(247,244,238,.6);line-height:2}

/* ---------- 首页 Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:var(--paper);
  background:
    radial-gradient(90% 70% at 84% 6%, rgba(182,135,74,.22), transparent 62%),
    radial-gradient(70% 60% at 6% 96%, rgba(63,111,134,.16), transparent 60%),
    linear-gradient(168deg,#242019 0%,#181610 52%,#0e0d0a 100%);
  padding:clamp(72px,9vw,118px) 0 0;
}
.hero:before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 50% 50%, rgba(255,255,255,.55) .8px, transparent .8px);
  background-size:38px 38px;opacity:.07;
}
.hero:after{
  content:"";position:absolute;right:-10%;top:-20%;width:56%;height:120%;pointer-events:none;
  background:radial-gradient(closest-side, rgba(208,167,101,.14), transparent 70%);
}
.hero .wrap{position:relative;z-index:3}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(30px,4vw,64px);align-items:center}
.hero .quote{font-family:var(--serif);font-size:clamp(14px,1.3vw,17px);color:var(--gold-2);letter-spacing:.28em;margin-bottom:20px;display:inline-block}
.hero h1{font-family:var(--serif);font-size:clamp(26px,4vw,50px);line-height:1.16;font-weight:700;letter-spacing:.03em}
.hero h1 em{font-style:normal;color:var(--gold-2);position:relative;white-space:nowrap}
.hero p.sub{margin-top:24px;font-size:clamp(15px,1.25vw,17px);color:rgba(247,244,238,.78);max-width:560px}
.hero .cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.hero .cta .btn-gold{background:var(--gold);color:#1a1712}
.hero .cta .btn-gold:hover{background:var(--gold-2);color:#1a1712}
.hero .cta .btn-outline{border-color:rgba(247,244,238,.34);color:var(--paper)}
.hero .cta .btn-outline:hover{background:rgba(247,244,238,.12);border-color:rgba(247,244,238,.6);color:#fff}
.hero-trust{margin-top:38px;display:flex;gap:26px;flex-wrap:wrap;padding-top:26px;border-top:1px solid rgba(247,244,238,.14)}
.hero-trust .t b{display:block;font-family:var(--serif);font-size:clamp(13px,1.1vw,18px);color:var(--gold-2);line-height:1.2}
.hero-trust .t span{font-size:12px;letter-spacing:.12em;color:rgba(247,244,238,.6)}

/* 首屏作品墙 */
.hero-media{position:relative;height:clamp(360px,32vw,440px)}
.frame{
  position:absolute;background:#fff;padding:10px;border-radius:4px;
  box-shadow:0 26px 60px rgba(0,0,0,.5);
  transition:transform .5s cubic-bezier(.22,.61,.36,1),box-shadow .5s ease;
}
.frame img{width:100%;height:100%;object-fit:cover;border-radius:2px;display:block}
.f1{left:0;top:9%;width:44%;aspect-ratio:3/4;transform:rotate(-2.4deg);z-index:2}
.f2{left:27%;top:0;width:48%;aspect-ratio:3/4;transform:rotate(1.2deg);z-index:3}
.f3{left:56%;top:15%;width:44%;aspect-ratio:3/4;transform:rotate(3.4deg);z-index:1}
.frame:hover{transform:rotate(0deg) translateY(-10px) scale(1.04);z-index:9;box-shadow:0 40px 90px rgba(0,0,0,.62)}
.hero-chip{
  position:absolute;left:-4%;bottom:6%;z-index:6;
  background:linear-gradient(135deg,#1d1a14,#2b2620);
  border:1px solid rgba(208,167,101,.42);border-radius:12px;
  padding:14px 20px;display:flex;align-items:center;gap:14px;
  box-shadow:0 18px 44px rgba(0,0,0,.45);
}
.hero-chip b{font-family:var(--serif);font-size:26px;color:var(--gold-2);line-height:1}
.hero-chip span{font-size:12px;color:rgba(247,244,238,.66);letter-spacing:.1em;line-height:1.5}

/* 首屏底部滚动作品条 */
.marquee{
  position:relative;z-index:3;margin-top:clamp(40px,5vw,64px);
  padding:16px 0 18px;border-top:1px solid rgba(247,244,238,.12);
  overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
}
.marquee-track{display:flex;gap:14px;width:max-content;animation:marquee 58s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee img{height:clamp(76px,8vw,104px);width:auto;border-radius:3px;border:1px solid rgba(255,255,255,.16);opacity:.9;transition:opacity .3s ease,transform .3s ease}
.marquee img:hover{opacity:1;transform:translateY(-3px)}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 数据条 ---------- */
.stats{background:var(--ink);color:var(--paper);padding:clamp(46px,5vw,64px) 0}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.stat{text-align:center;padding:8px 18px;position:relative}
.stat+.stat:before{content:"";position:absolute;left:0;top:12%;bottom:12%;width:1px;background:linear-gradient(180deg,transparent,rgba(247,244,238,.22),transparent)}
.stat .n{font-family:var(--serif);font-size:clamp(28px,3.6vw,44px);color:var(--gold-2);font-weight:700;line-height:1.1;letter-spacing:.02em}
.stat .t{margin-top:10px;font-size:13.5px;color:rgba(247,244,238,.72);letter-spacing:.04em}

/* ---------- 网格与卡片 ---------- */
.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}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;position:relative;overflow:hidden;
  transition:transform .35s cubic-bezier(.22,.61,.36,1),box-shadow .35s ease,border-color .35s ease;
}
.card:before{content:"";position:absolute;left:0;top:0;height:2px;width:0;background:linear-gradient(90deg,var(--gold),var(--gold-2));transition:width .45s cubic-bezier(.22,.61,.36,1)}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-m);border-color:rgba(182,135,74,.34)}
.card:hover:before{width:100%}
.card .ic{
  width:48px;height:48px;border-radius:10px;background:var(--paper-2);color:var(--gold-ink);
  display:flex;align-items:center;justify-content:center;font-family:var(--serif);
  font-size:19px;font-weight:700;margin-bottom:16px;border:1px solid rgba(182,135,74,.28);
}
.card h3{font-family:var(--serif);font-size:20px;margin-bottom:10px;letter-spacing:.01em}
.card p{color:var(--muted);font-size:15px}
.card .tag{position:absolute;top:18px;right:18px;font-size:11px;letter-spacing:.08em;color:var(--gold-ink);border:1px solid rgba(182,135,74,.45);border-radius:999px;padding:3px 11px;background:rgba(182,135,74,.06)}
.sec-head{margin-bottom:clamp(30px,3.4vw,48px)}

/* 编号式要点（替代卡片堆叠） */
.point-list{display:grid;gap:0;border-top:1px solid var(--line)}
.point{display:grid;grid-template-columns:74px 1fr;gap:20px;padding:26px 4px;border-bottom:1px solid var(--line);transition:background .3s ease,padding .3s ease}
.point:hover{background:rgba(182,135,74,.05);padding-left:14px}
.point .no{font-family:var(--serif);font-size:26px;color:var(--gold);line-height:1.2;font-weight:700}
.point h3{font-family:var(--serif);font-size:19px;margin-bottom:7px}
.point p{color:var(--muted);font-size:15px}

/* ---------- 引文 ---------- */
.quote-block{position:relative;padding:6px 0 6px 30px;border-left:2px solid var(--gold)}
.quote-block p{font-family:var(--serif);font-size:clamp(19px,2vw,24px);line-height:1.85;color:var(--ink-2)}
.quote-block cite{display:block;margin-top:14px;font-style:normal;font-size:13px;letter-spacing:.16em;color:var(--muted)}

/* ---------- 双轨课程 ---------- */
.course-tease{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.course-tease>div{padding:clamp(28px,3.4vw,44px);position:relative}
.course-tease .left{background:linear-gradient(160deg,#221f18,#14130f);color:var(--paper)}
.course-tease .left .h2{color:#fff}
.course-tease .left .h2 .en{color:rgba(247,244,238,.55)}
.course-tease .panel-no{font-family:var(--serif);font-size:13px;letter-spacing:.28em;color:var(--gold-2);display:block;margin-bottom:14px}
.course-tease ul{list-style:none;margin-top:20px}
.course-tease li{padding:13px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;color:var(--ink-3);font-size:15px}
.course-tease .left li{border-color:rgba(247,244,238,.14);color:rgba(247,244,238,.88)}
.course-tease li span:last-child{color:var(--gold-ink);font-size:13px;letter-spacing:.04em;flex:none}
.course-tease .left li span:last-child{color:var(--gold-2)}
.pill-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}
.pill{font-size:12.5px;border:1px solid rgba(182,135,74,.45);color:var(--gold-ink);border-radius:999px;padding:6px 14px;letter-spacing:.03em;background:rgba(182,135,74,.05)}
.course-tease .left .pill{border-color:rgba(208,167,101,.45);color:var(--gold-2);background:rgba(208,167,101,.08)}

/* ---------- 学员作品 ---------- */
.works-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap}
.filters{display:flex;gap:9px;flex-wrap:wrap}
.chip{
  font-size:13.5px;padding:8px 17px;border-radius:999px;border:1px solid var(--line-2);
  background:transparent;color:var(--ink-3);cursor:pointer;transition:.25s ease;
}
.chip:hover{border-color:var(--gold);color:var(--gold-ink)}
.chip.active{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.works-grid{columns:4;column-gap:16px;margin-top:34px}
/* 星光墙（首页 featured）：横幅统一网格，整齐对齐 */
[data-only="featured"] .works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
[data-only="featured"] .work{margin:0}
[data-only="featured"] .work .mat img{aspect-ratio:4/3;object-fit:cover;height:auto}
@media(max-width:1024px){[data-only="featured"] .works-grid{grid-template-columns:repeat(2,1fr)}}
.work{break-inside:avoid;margin:0 0 16px;display:block;width:100%;background:none;border:0;padding:0;text-align:left;cursor:zoom-in;font-family:inherit}
.work .mat{display:block;background:#fff;padding:9px;border-radius:4px;border:1px solid rgba(20,19,15,.07);box-shadow:var(--shadow-frame);transition:transform .4s cubic-bezier(.22,.61,.36,1),box-shadow .4s ease}
.work img{width:100%;height:auto;border-radius:2px}
.work:hover .mat{transform:translateY(-5px);box-shadow:0 20px 46px rgba(20,19,15,.2)}
.work .cap{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:9px 3px 2px;font-size:12px;color:var(--muted)}
.work .cap b{font-family:var(--serif);font-weight:600;font-size:13px;color:var(--ink-2)}
.work[hidden]{display:none}
.works-more{margin-top:34px;text-align:center}

/* 灯箱 */
.lightbox{position:fixed;inset:0;z-index:200;background:rgba(13,12,9,.95);display:none;align-items:center;justify-content:center;padding:4vh 4vw}
.lightbox.open{display:flex}
.lightbox .lb-stage{max-width:min(1180px,90vw);max-height:86vh;position:relative}
.lightbox img{max-width:100%;max-height:76vh;width:auto;margin:0 auto;background:#fff;padding:10px;border-radius:3px;box-shadow:0 40px 90px rgba(0,0,0,.65)}
.lightbox .lb-cap{margin-top:14px;display:flex;justify-content:space-between;gap:16px;color:rgba(247,244,238,.72);font-size:13px}
.lightbox .lb-cap b{font-family:var(--serif);color:#fff;font-weight:600;font-size:15px}
.lb-btn{
  position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;
  background:rgba(247,244,238,.1);border:1px solid rgba(247,244,238,.24);color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:20px;transition:.25s ease;
}
.lb-btn:hover{background:rgba(247,244,238,.24)}
.lb-prev{left:-68px}
.lb-next{right:-68px}
.lb-close{position:fixed;top:22px;right:26px;width:46px;height:46px;border-radius:50%;background:rgba(247,244,238,.1);border:1px solid rgba(247,244,238,.24);color:#fff;font-size:19px;cursor:pointer}
.lb-close:hover{background:rgba(247,244,238,.24)}

/* ---------- 战绩 ---------- */
.medal{display:flex;align-items:baseline;gap:6px;font-family:var(--serif);color:var(--gold-ink);margin-bottom:12px}
.medal b{font-size:30px;line-height:1}
.medal span{font-size:13px;color:var(--muted);letter-spacing:.06em}
.card.center .medal{justify-content:center}

/* ---------- 时间轴（分龄） ---------- */
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;margin-top:10px}
.timeline:before{content:"";position:absolute;left:6%;right:6%;top:9px;height:1px;background:linear-gradient(90deg,transparent,rgba(182,135,74,.5),rgba(182,135,74,.5),transparent)}
.tl{position:relative;padding-top:44px}
.tl:before{content:"";position:absolute;top:2px;left:0;width:15px;height:15px;border-radius:50%;background:var(--paper);border:2px solid var(--gold);box-shadow:0 0 0 5px rgba(182,135,74,.12)}
.tl .age{font-family:var(--serif);font-size:15px;color:var(--gold-ink);letter-spacing:.1em;display:block;margin-bottom:8px}
.tl h3{font-family:var(--serif);font-size:20px;margin-bottom:9px}
.tl p{color:var(--muted);font-size:15px}

/* ---------- 获奖星光榜 ---------- */
.award-block{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(22px,2.6vw,32px);margin-bottom:18px;transition:.3s ease;
}
.award-block:hover{border-color:rgba(182,135,74,.34);box-shadow:var(--shadow-s)}
.award-head{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;
  padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:6px;
}
.award-head h3{font-family:var(--serif);font-size:clamp(18px,2vw,22px);letter-spacing:.01em}
.award-head .sum{font-family:var(--serif);color:var(--gold-ink);font-size:15px;letter-spacing:.06em;flex:none}
.award-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 34px}
.award-row{
  display:flex;align-items:baseline;gap:10px;padding:11px 0;
  border-bottom:1px dashed var(--line);font-size:14.5px;
}
.award-row .aw-medal{
  flex:none;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;font-family:var(--serif);color:#fff;transform:translateY(4px);
}
.aw-medal.gold{background:linear-gradient(140deg,#d9b06a,#b6874a)}
.aw-medal.silver{background:linear-gradient(140deg,#b9b7b1,#8d8a84)}
.aw-medal.bronze{background:linear-gradient(140deg,#c08a5c,#96603a)}
.aw-medal.top{background:linear-gradient(140deg,#2f2a20,#14130f)}
.award-row .aw-title{font-family:var(--serif);color:var(--ink-2);font-size:15px;flex:1;min-width:0}
.award-row .aw-author{color:var(--muted);font-size:13px;flex:none;letter-spacing:.02em}

/* ---------- 资讯：日期 ---------- */
.news-card .date{font-size:12.5px;color:var(--muted);letter-spacing:.06em}

/* ---------- 课程分层表 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-top:22px}
table.tier{width:100%;border-collapse:collapse;font-size:14.5px;min-width:660px}
table.tier th,table.tier td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.tier th{background:var(--paper-2);font-family:var(--serif);font-weight:700;color:var(--ink);letter-spacing:.05em;font-size:14px;white-space:nowrap}
table.tier tbody tr:last-child td{border-bottom:0}
table.tier tbody tr{transition:background .25s ease}
table.tier tbody tr:hover{background:rgba(182,135,74,.05)}
table.tier td:first-child{font-family:var(--serif);color:var(--ink-2);white-space:nowrap;font-size:15px}
table.tier td:nth-child(2){color:var(--gold-ink);white-space:nowrap;font-size:13.5px}
table.tier td:last-child{color:var(--muted)}

/* ---------- 报名流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;counter-reset:s;margin-top:12px}
.step{position:relative;padding-top:40px;font-size:14px;color:var(--muted)}
.step:before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  position:absolute;top:0;left:0;font-family:var(--serif);font-size:22px;
  color:var(--gold);font-weight:700;line-height:1;
}
.step:after{content:"";position:absolute;top:11px;left:38px;right:6px;height:1px;background:linear-gradient(90deg,var(--gold-2),transparent)}
.step:last-child:after{display:none}
.step b{display:block;color:var(--ink);font-family:var(--serif);font-size:15.5px;margin-bottom:5px}

/* ---------- 长文（隐私政策等） ---------- */
.doc{max-width:840px;margin:0 auto}
.doc .updated{font-size:13px;color:var(--muted);letter-spacing:.06em;padding-bottom:20px;border-bottom:1px solid var(--line)}
.doc h2{font-family:var(--serif);font-size:clamp(18px,2vw,22px);margin:36px 0 12px;letter-spacing:.02em}
.doc h2:first-of-type{margin-top:26px}
.doc p,.doc li{color:var(--muted);font-size:15.5px;line-height:1.9}
.doc p{margin-bottom:12px}
.doc ul{padding-left:22px;margin:8px 0 16px}
.doc li{margin-bottom:8px}
.doc b{color:var(--ink-2);font-weight:600}

/* ---------- 资讯 ---------- */
.news-card{display:flex;flex-direction:column;gap:10px;padding:28px}
.news-card .meta{font-size:12.5px;color:var(--gold-ink);letter-spacing:.1em}
.news-card h3{font-family:var(--serif);font-size:18px;line-height:1.5}
.news-card p{color:var(--muted);font-size:14.5px}
.news-card .more{color:var(--gold-ink);font-size:14px;font-weight:600;margin-top:auto;padding-top:8px;display:inline-flex;align-items:center;gap:6px}
.news-card .more .arw{transition:transform .25s ease}
.news-card:hover .more .arw{transform:translateX(4px)}
.news-card .news-cover{display:block;width:calc(100% + 56px);margin:-28px -28px 16px;aspect-ratio:4/3;object-fit:cover;border-radius:0}
.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:22px;margin-top:10px}
.video-card{margin:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-m);background:#000}
.news-video{width:100%;display:block;aspect-ratio:16/9;background:#000}
.video-card figcaption{padding:12px 16px;font-size:14px;color:var(--muted);background:#fff}

/* ---------- 表单 ---------- */
.lead-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(26px,3vw,38px);box-shadow:var(--shadow-m)}
.lead-form h3{font-family:var(--serif);font-size:24px;margin-bottom:6px}
.lead-form .desc{color:var(--muted);font-size:14.5px;margin-bottom:22px}
.field{margin-bottom:15px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:7px;letter-spacing:.06em}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line-2);border-radius:9px;
  font-family:var(--sans);font-size:15px;background:var(--paper);color:var(--ink);
  transition:border-color .25s ease,background .25s ease,box-shadow .25s ease;
}
.field input::placeholder,.field textarea::placeholder{color:#a9a294}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--gold);background:#fff;box-shadow:0 0 0 3px rgba(182,135,74,.14);
}
.lead-form .btn[type=submit]{width:100%;margin-top:6px}
.form-note{font-size:12px;color:var(--muted);margin-top:12px}
.form-ok{display:none;background:rgba(68,100,90,.09);border:1px solid rgba(68,100,90,.5);color:#2f4c42;padding:15px 16px;border-radius:9px;margin-top:16px;font-size:14px}
.form-ok.show{display:block}
.lead-wrap{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,4vw,56px);align-items:center}

/* ---------- 页面头（内页） ---------- */
.page-head{
  position:relative;overflow:hidden;color:var(--paper);
  background:linear-gradient(160deg,#242019,#16150f 70%,#0e0d0a);
  padding:clamp(56px,7vw,86px) 0 clamp(48px,6vw,70px);
}
.page-head:before{
  content:"";position:absolute;inset:0;opacity:.07;
  background-image:radial-gradient(circle at 50% 50%, #fff .8px, transparent .8px);
  background-size:38px 38px;
}
.page-head:after{
  content:"";position:absolute;right:-14%;top:-40%;width:52%;height:150%;
  background:radial-gradient(closest-side,rgba(208,167,101,.16),transparent 70%);
}
.page-head .wrap{position:relative;z-index:2}
.page-head .eyebrow{color:var(--gold-2)}
.page-head h1{font-family:var(--serif);font-size:clamp(28px,3.8vw,48px);font-weight:700;letter-spacing:.03em;line-height:1.22;max-width:20em}
.page-head p{color:rgba(247,244,238,.72);margin-top:16px;max-width:660px;font-size:clamp(14.5px,1.15vw,16.5px)}
.crumb{font-size:13px;color:rgba(247,244,238,.5);margin-bottom:14px}
.crumb a:hover{color:var(--gold-2)}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:#fff;position:relative;transition:.35s ease}
.price:hover{transform:translateY(-4px);box-shadow:var(--shadow-m)}
.price.featured{border-color:rgba(182,135,74,.5);box-shadow:var(--shadow-m)}
.price.featured:before{content:"热门";position:absolute;top:-11px;left:30px;background:var(--gold);color:#fff;font-size:11.5px;letter-spacing:.1em;padding:3px 12px;border-radius:999px}
.price .name{font-family:var(--serif);font-size:19px}
.price .num{font-family:var(--serif);font-size:32px;color:var(--gold-ink);margin:12px 0;line-height:1}
.price .num small{font-size:14px;color:var(--muted);font-family:var(--sans)}
.price .ask{font-family:var(--serif);font-size:19px;color:var(--gold-ink);margin:12px 0 4px;letter-spacing:.04em}
.price ul{list-style:none;margin-top:16px;color:var(--muted);font-size:14.5px}
.price li{padding:9px 0 9px 22px;border-bottom:1px dashed var(--line);position:relative}
.price li:before{content:"";position:absolute;left:2px;top:17px;width:6px;height:6px;border-radius:50%;background:var(--gold-2)}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:0}
.qa{border-bottom:1px solid var(--line);padding:26px 0}
.qa:first-child{padding-top:0}
.qa h3{font-family:var(--serif);font-size:19px;margin-bottom:11px;position:relative;padding-left:30px;line-height:1.5}
.qa h3:before{content:"Q";position:absolute;left:0;top:0;color:var(--gold);font-weight:700;font-size:17px}
.qa p{color:var(--muted);font-size:15.5px;padding-left:30px}

/* ---------- 联系页 ---------- */
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.3s ease}
.info-card:hover{border-color:rgba(182,135,74,.3);box-shadow:var(--shadow-s)}
.info-card h3{font-family:var(--serif);font-size:19px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.info-card .contact-line{font-size:15px;margin:10px 0;color:var(--ink-3);display:flex;gap:12px;align-items:flex-start}
.info-card .contact-line b{font-weight:500;color:var(--muted);font-size:13px;letter-spacing:.06em;flex:none;width:76px;padding-top:2px}
.qr-slot{width:112px;height:112px;border:1px dashed rgba(182,135,74,.6);border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted);font-size:12px;line-height:1.6;background:var(--paper)}
.map-box{margin-top:20px;background:var(--paper);border:1px dashed rgba(182,135,74,.55);border-radius:var(--radius);padding:38px 24px;text-align:center;color:var(--muted)}
.map-box span{font-family:var(--serif);font-size:19px;color:var(--gold-ink);display:block;margin-bottom:8px}
.map-box small{font-size:13px}

/* ---------- CTA 收尾 ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(140deg,#221f18,#0f0e0b);color:var(--paper);padding:clamp(56px,6.4vw,86px) 0;text-align:center}
.cta-band:before{content:"";position:absolute;inset:0;background:radial-gradient(60% 120% at 50% 0%,rgba(208,167,101,.18),transparent 65%)}
.cta-band .wrap{position:relative;z-index:2}
.cta-band h2{font-family:var(--serif);font-size:clamp(26px,3.4vw,42px);line-height:1.28}
.cta-band p{color:rgba(247,244,238,.72);margin-top:14px;max-width:620px;margin-left:auto;margin-right:auto}
.cta-band .btns{margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta-band .btn-gold{background:var(--gold);color:#1a1712}
.cta-band .btn-gold:hover{background:var(--gold-2)}
.cta-band .btn-outline{border-color:rgba(247,244,238,.32);color:var(--paper)}
.cta-band .btn-outline:hover{background:rgba(247,244,238,.12);color:#fff;border-color:rgba(247,244,238,.6)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(247,244,238,.72);padding:clamp(48px,5.4vw,70px) 0 28px}
.site-footer .cols{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:34px}
.site-footer h5{color:#fff;font-family:var(--serif);font-size:16px;margin-bottom:16px;letter-spacing:.08em}
.site-footer a{display:block;color:rgba(247,244,238,.66);font-size:14px;padding:6px 0;transition:color .2s ease,transform .2s ease}
.site-footer a:hover{color:var(--gold-2);transform:translateX(3px)}
.site-footer .f-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.site-footer .f-brand img{width:42px;height:42px;border-radius:9px;border:1px solid rgba(208,167,101,.34);object-fit:cover}
.site-footer .f-brand b{font-family:var(--serif);font-size:19px;color:#fff;letter-spacing:.08em}
.site-footer .f-brand i{display:block;font-style:normal;font-size:10px;letter-spacing:.24em;color:var(--gold-2);font-weight:600}
.site-footer .contact-line{font-size:14px;margin:7px 0;color:rgba(247,244,238,.7)}
.site-footer .bottom{
  border-top:1px solid rgba(247,244,238,.13);margin-top:38px;padding-top:20px;
  font-size:12.5px;color:rgba(247,244,238,.45);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.site-footer .quote-line{font-family:var(--serif);font-size:15px;color:rgba(247,244,238,.55);letter-spacing:.2em;margin-top:14px}

/* ---------- 移动端底部操作条 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  background:rgba(20,19,15,.96);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid rgba(247,244,238,.12);
  padding-bottom:env(safe-area-inset-bottom);
  transform:translateY(110%);transition:transform .35s cubic-bezier(.22,.61,.36,1);
}
.mobile-bar.show{transform:none}
.mobile-bar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:10px 4px;color:rgba(247,244,238,.86)}
.mobile-bar a b{font-size:12.5px;font-weight:500}
.mobile-bar a.hl{background:var(--gold);color:#1a1712}
.mobile-bar a.hl b{font-weight:700}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .75s ease,transform .75s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}
.reveal-d1{transition-delay:.09s}
.reveal-d2{transition-delay:.18s}
.reveal-d3{transition-delay:.27s}
.reveal-d4{transition-delay:.36s}

/* ---------- 内部备注（仅 ?dev=1 可见） ---------- */

/* ---------- 在线客服挂件 ---------- */
.cs-launcher{
  position:fixed;right:22px;bottom:22px;z-index:120;
  display:flex;align-items:center;gap:10px;
  padding:13px 20px 13px 15px;border-radius:999px;border:1px solid rgba(208,167,101,.5);
  background:linear-gradient(140deg,#242019,#14130f);color:var(--paper);
  box-shadow:0 16px 40px rgba(20,19,15,.34);cursor:pointer;font:inherit;font-size:14.5px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.cs-launcher:hover{transform:translateY(-3px);box-shadow:0 22px 50px rgba(20,19,15,.42)}
.cs-launcher .dot{
  width:9px;height:9px;border-radius:50%;background:#67b98c;flex:none;
  box-shadow:0 0 0 4px rgba(103,185,140,.18);
}
.cs-launcher b{font-weight:600;letter-spacing:.04em}
.cs-launcher.hidden{transform:translateY(140%);opacity:0;pointer-events:none}

.cs-panel{
  position:fixed;right:22px;bottom:22px;z-index:130;
  width:min(376px,calc(100vw - 32px));height:min(560px,calc(100vh - 60px));
  background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  display:flex;flex-direction:column;box-shadow:0 30px 70px rgba(20,19,15,.34);
  transform:translateY(14px) scale(.98);opacity:0;pointer-events:none;
  transition:opacity .25s ease,transform .25s cubic-bezier(.22,.61,.36,1);
}
.cs-panel.open{transform:none;opacity:1;pointer-events:auto}
.cs-head{
  background:linear-gradient(140deg,#242019,#14130f);color:var(--paper);
  padding:15px 18px;display:flex;align-items:center;gap:11px;flex:none;
}
.cs-head .cs-avatar{
  width:36px;height:36px;border-radius:10px;overflow:hidden;flex:none;
  border:1px solid rgba(208,167,101,.45);background:#fff;
}
.cs-head .cs-avatar img{width:100%;height:100%;object-fit:cover}
.cs-head .cs-title{flex:1;min-width:0}
.cs-head .cs-title b{display:block;font-family:var(--serif);font-size:15.5px;letter-spacing:.06em}
.cs-head .cs-title span{font-size:11.5px;color:rgba(247,244,238,.6);letter-spacing:.06em}
.cs-head .cs-close{background:none;border:0;color:rgba(247,244,238,.75);font-size:20px;line-height:1;cursor:pointer;padding:4px}
.cs-head .cs-close:hover{color:#fff}
.cs-body{flex:1;overflow-y:auto;padding:16px 16px 6px;background:var(--paper);display:flex;flex-direction:column;gap:12px}
.cs-msg{display:flex;gap:8px;max-width:86%}
.cs-msg .bubble{
  padding:10px 13px;border-radius:12px;font-size:14px;line-height:1.65;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);
}
.cs-msg.me{align-self:flex-end;flex-direction:row-reverse}
.cs-msg.me .bubble{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.cs-msg.sys{max-width:100%}
.cs-msg.sys .bubble{background:rgba(182,135,74,.09);border-color:rgba(182,135,74,.3);color:var(--gold-ink);font-size:12.5px;text-align:center;width:100%}
.cs-typing .bubble{display:flex;gap:4px;align-items:center;height:20px}
.cs-typing i{width:6px;height:6px;border-radius:50%;background:var(--gold-2);animation:cs-bounce 1.1s infinite}
.cs-typing i:nth-child(2){animation-delay:.16s}
.cs-typing i:nth-child(3){animation-delay:.32s}
@keyframes cs-bounce{0%,60%,100%{transform:translateY(0);opacity:.45}30%{transform:translateY(-5px);opacity:1}}
.cs-quick{display:flex;gap:8px;flex-wrap:wrap;padding:0 16px 12px}
.cs-quick button{
  font:inherit;font-size:12.5px;padding:7px 13px;border-radius:999px;
  border:1px solid rgba(182,135,74,.45);background:rgba(182,135,74,.06);color:var(--gold-ink);cursor:pointer;
  transition:.2s ease;
}
.cs-quick button:hover{background:var(--gold);border-color:var(--gold);color:#fff}
.cs-foot{display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--line);background:#fff;flex:none}
.cs-foot textarea{
  flex:1;resize:none;height:44px;max-height:110px;padding:11px 13px;border:1px solid var(--line-2);
  border-radius:10px;font:inherit;font-size:14px;background:var(--paper);color:var(--ink);
}
.cs-foot textarea:focus{outline:none;border-color:var(--gold);background:#fff}
.cs-foot button{
  flex:none;width:46px;height:44px;border-radius:10px;border:0;background:var(--ink);color:var(--paper);
  font-size:17px;cursor:pointer;transition:.2s ease;
}
.cs-foot button:hover{background:var(--gold)}
.cs-foot button:disabled{opacity:.5;cursor:default}

@media(max-width:680px){
  .cs-launcher{right:14px;bottom:78px;padding:11px 16px 11px 13px;font-size:13.5px}
  .cs-panel{right:8px;left:8px;bottom:72px;width:auto;height:min(72vh,520px)}
}

/* ---------- 内部备注（仅 ?dev=1 可见） ---------- */
.missing{display:none;background:#fff8ea;border:1px dashed rgba(182,135,74,.7);border-radius:var(--radius);padding:24px 28px}
html.dev .missing{display:block}
html:not(.dev) .dev-only{display:none}
.missing h4{font-family:var(--serif);color:#8a5a1e;font-size:18px;margin-bottom:10px}
.missing ul{margin-left:18px;color:#6b4f2a;font-size:14px}
.missing ul li{margin:6px 0}

/* ---------- 响应式 ---------- */
/* 视口不足以在画面外放置左右按钮时，收回到画面边缘内 */
@media(max-width:1460px){
  .lb-prev{left:-14px}
  .lb-next{right:-14px}
}
/* 9 个菜单项 + 品牌 + 两个按钮，实测需要约 1215px。
   1400px 以下先收紧间距，1200px 以下干脆收进抽屉菜单，避免挤到换行。 */
@media(max-width:1400px){
  .nav{gap:12px}
  .menu{gap:2px}
  .menu a{padding:9px 9px;font-size:14px;letter-spacing:-.01em}
  .brand-txt i{letter-spacing:.2em}
  .nav-cta{gap:8px;margin-left:6px}
  .nav-cta .btn{padding:10px 15px;font-size:13.5px}
}
@media(max-width:1240px){
  .menu,.nav-cta{display:none}
  .burger{display:flex}
  .steps{grid-template-columns:repeat(3,1fr)}
  .hero-grid{grid-template-columns:1fr}
  .hero-media{height:clamp(330px,52vw,420px);margin-top:8px;max-width:620px}
  .works-grid{columns:3}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .site-footer .cols{grid-template-columns:1fr 1fr;gap:28px}
  .price-grid{grid-template-columns:1fr}
  .course-tease{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr;gap:0}
  .timeline:before{left:7px;right:auto;top:8px;bottom:8px;width:1px;height:auto;background:linear-gradient(180deg,transparent,rgba(182,135,74,.5),transparent)}
  .tl{padding:0 0 26px 34px}
  .tl:before{top:4px}
}
@media(max-width:860px){
  .stats .grid{grid-template-columns:repeat(2,1fr);gap:26px 0}
  .stat:nth-child(3):before{display:none}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .lead-wrap{grid-template-columns:1fr}
  .hero-trust{gap:18px 26px}
}
@media(max-width:680px){
  :root{--sec:58px}
  .wrap{padding:0 18px}
  .works-grid{columns:2;column-gap:12px}
  .work{margin-bottom:12px}
  .work .mat{padding:6px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .grid-2.keep-2{grid-template-columns:repeat(2,1fr)}
  .point{grid-template-columns:56px 1fr;gap:14px}
  .hero{padding-top:56px}
  .hero-media{height:clamp(300px,74vw,380px)}
  .hero-chip{left:0;bottom:auto;top:calc(100% - 30px);padding:11px 15px;gap:10px}
  .hero-chip b{font-size:22px}
  .mobile-bar{display:flex}
  .steps{grid-template-columns:repeat(2,1fr)}
  body.has-mobile-bar{padding-bottom:62px}
  .site-footer{padding-bottom:84px}
  .lb-prev,.lb-next{width:44px;height:44px}
  .lb-prev{left:6px}
  .lb-next{right:6px}
  .lightbox{padding:0 14px}
  .lightbox img{max-height:64vh;padding:7px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .marquee-track{animation:none}
}

/* 窄屏放不下时，把品牌英文副标题收起，只留徽标 + 中文名 */
@media(max-width:680px){
  .brand-txt{gap:0}
  .brand-txt i{display:none}
}

/* ---------- 表单校验 / 无后端兜底提示（原样式缺失，提示会裸奔） ---------- */
.form-err{
  margin-top:14px;padding:13px 15px;border-radius:9px;font-size:14px;line-height:1.65;
  background:rgba(180,60,60,.08);border:1px solid rgba(180,60,60,.45);color:#8a2f2f;
}
/* 绑定表单时会插入空容器，空的时候不占位 */
.form-err:empty{display:none}