/* ============================================================
   启晟 QISHENG — 展示型官网（外贸定制）
   视觉语言：pnktrading 的骨架 + 清爽木色（浅底 / 暖木点缀 / 发丝线）
   01 字体  02 变量  03 基础  04 组件  05 导航  06 HERO  07 区块头
   08 能力  09 为什么  10 产品  11 风格  12 案例  13 流程
   14 承诺  15 FAQ  16 联系  17 页脚  18 响应式  19 动效
   ============================================================ */

/* ---------- 01 字体（本地自托管，不依赖 Google Fonts） ---------- */
@font-face{
  font-family:'Archivo';
  src:url('../fonts/archivo-latin.woff2') format('woff2');
  font-weight:200 900;
  font-style:normal;
  font-display:swap;
  unicode-range:U+0000-00FF,U+2000-206F,U+20AC,U+2122;
}

/* ---------- 02 变量 ---------- */
:root{
  /* 底色：米白纸张 → 沙色 → 深一度沙色 */
  --paper:#faf7f1;
  --paper-2:#f2ebdf;
  --paper-3:#eae0cd;
  --card:#fffdf9;

  /* 文字 */
  --ink:#2b2620;
  --ink-2:rgba(43,38,32,.66);
  --ink-3:rgba(43,38,32,.5);

  /* 木色：wood 只用于线条与图标，文字一律用 wood-deep 保证对比度 */
  --wood:#b3814f;
  --wood-2:#c99a63;
  --wood-deep:#8a5f37;
  --wood-tint:rgba(179,129,79,.1);

  --err:#b34a2c;
  --ok:#4d6b3c;

  --line:rgba(43,38,32,.13);
  --line-2:rgba(43,38,32,.07);
  --line-3:rgba(43,38,32,.22);

  --sans:'Archivo','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace;

  --wrap:1280px;
  --gut:clamp(20px,4.2vw,56px);
  --sect:clamp(70px,9vw,132px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:76px;
}

/* ---------- 03 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure,figcaption{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--wood-tint);color:var(--wood-deep)}
:focus-visible{outline:2px solid var(--wood-deep);outline-offset:3px}

.skip-link{
  position:fixed;left:16px;top:-64px;z-index:300;
  background:var(--ink);color:var(--paper);padding:10px 18px;font-size:13px;
  transition:top .2s;
}
.skip-link:focus{top:12px}
section[id]{scroll-margin-top:var(--nav-h)}

/* ---------- 04 组件 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gut)}

.sec{position:relative;padding-block:var(--sect)}
.sec--paper{background:var(--paper)}
.sec--sand{background:var(--paper-2)}
.sec--tight{padding-block:clamp(56px,7vw,96px)}
.sec--flush{padding-bottom:0}

.kicker{
  display:flex;align-items:center;gap:12px;
  font-size:11px;font-weight:600;letter-spacing:.22em;
  text-transform:uppercase;color:var(--ink-2);margin-bottom:22px;
}
.kicker i{display:block;width:26px;height:2px;background:var(--wood);flex:none}

.h2{
  font-size:clamp(28px,4.4vw,58px);line-height:1.14;
  font-weight:800;letter-spacing:-.01em;color:var(--ink);
  text-wrap:balance;
}
.h2 em{font-style:normal;color:var(--wood-deep)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 28px;border-radius:999px;border:1px solid transparent;
  font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:background .3s var(--ease),color .3s var(--ease),
             border-color .3s var(--ease),transform .3s var(--ease);
}
.btn svg{width:16px;height:16px;flex:none;transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn--accent{background:var(--wood-deep);color:#fffdf8}
.btn--accent:hover{background:#9b6f45}
.btn--ghost{border-color:var(--line-3);color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn--sm{padding:10px 18px;font-size:13px}
.btn--lg{padding:17px 34px;font-size:15.5px}
.btn--block{width:100%;margin-top:6px}

.pill{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 16px;border-radius:999px;border:1px solid var(--line-3);
  font-size:12px;font-weight:500;letter-spacing:.08em;color:var(--ink-2);
  background:rgba(255,253,249,.72);backdrop-filter:blur(6px);
}
.pill .dot{
  width:6px;height:6px;border-radius:50%;background:var(--wood);flex:none;
  box-shadow:0 0 0 3px rgba(179,129,79,.18);
}

.link-u{
  display:inline-block;font-size:14px;font-weight:600;
  border-bottom:1px solid currentColor;padding-bottom:2px;
  transition:color .3s;
}
.link-u:hover{color:var(--wood-deep)}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr)}

/* ---------- 05 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:100;
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease),border-color .4s var(--ease),backdrop-filter .4s;
}
.nav.is-solid{
  background:rgba(250,247,241,.9);
  backdrop-filter:saturate(140%) blur(16px);
  -webkit-backdrop-filter:saturate(140%) blur(16px);
  border-bottom-color:var(--line);
}
.nav__inner{
  max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gut);
  height:var(--nav-h);
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:start}
.brand__mark{width:25px;height:25px;flex:none;color:var(--wood-deep)}
.brand__text{display:flex;flex-direction:column;line-height:1}
.brand__cn{font-size:18px;font-weight:800;letter-spacing:.14em;color:var(--ink)}
.brand__en{font-size:8px;font-weight:600;letter-spacing:.3em;color:var(--ink-3);margin-top:5px}

.nav__links{display:flex;align-items:center;gap:clamp(14px,2.2vw,32px);justify-self:center}
.nav__links a{
  font-size:13.5px;font-weight:500;color:var(--ink-2);
  letter-spacing:.04em;transition:color .25s;
}
.nav__links a:hover{color:var(--ink)}

.nav__act{display:flex;align-items:center;gap:12px;justify-self:end}

/* 语言切换 */
.lang{
  display:flex;align-items:center;flex:none;
  border:1px solid var(--line-3);border-radius:999px;overflow:hidden;
  background:rgba(255,253,249,.6);
}
.lang__item{
  padding:7px 11px;font-size:11px;font-weight:600;letter-spacing:.06em;
  color:var(--ink-3);line-height:1;transition:background .25s,color .25s;
}
.lang__item:hover{color:var(--ink)}
.lang__item.is-active{background:var(--ink);color:var(--paper)}

.nav__burger{display:none;width:38px;height:38px;flex-direction:column;align-items:center;justify-content:center;gap:6px}
.nav__burger span{display:block;width:20px;height:1.5px;background:var(--ink);transition:transform .35s var(--ease),opacity .2s}
.nav__burger[aria-expanded="true"] span:first-child{transform:translateY(3.75px) rotate(45deg)}
.nav__burger[aria-expanded="true"] span:last-child{transform:translateY(-3.75px) rotate(-45deg)}

.menu{
  position:fixed;inset:0;z-index:95;background:var(--paper);
  padding:calc(var(--nav-h) + 24px) var(--gut) 34px;
  display:flex;flex-direction:column;justify-content:space-between;
  opacity:0;visibility:hidden;transition:opacity .35s var(--ease),visibility .35s;
}
.menu.is-open{opacity:1;visibility:visible}
.menu[hidden]{display:none}
.menu__list{display:flex;flex-direction:column}
.menu__list a{
  display:flex;align-items:baseline;gap:14px;
  padding:14px 0;border-bottom:1px solid var(--line-2);
  font-size:clamp(22px,6vw,28px);font-weight:700;letter-spacing:.02em;
}
.menu__list em{
  font-style:normal;font-family:var(--mono);
  font-size:10px;letter-spacing:.14em;color:var(--wood-deep);
}
.menu__foot{font-size:12px;color:var(--ink-3);letter-spacing:.1em}
.menu__foot p+p{margin-top:4px}
.menu__foot .lang{margin-top:16px;width:max-content}

/* ---------- 06 HERO ---------- */
.hero{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;justify-content:center;
  padding-top:calc(var(--nav-h) + 34px);padding-bottom:44px;
  isolation:isolate;background:var(--paper);overflow:hidden;
}
.hero__bg{position:absolute;inset:0;z-index:-1;overflow:hidden}
.hero__bg img{width:100%;height:100%;object-fit:cover;object-position:center 45%}
/* 左侧压一层米白纱保证深色文字可读，右侧放开让照片透出来 */
.hero__bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(97deg,rgba(250,247,241,.985) 0%,rgba(250,247,241,.97) 30%,
      rgba(250,247,241,.9) 42%,rgba(250,247,241,.52) 55%,
      rgba(250,247,241,.16) 68%,rgba(250,247,241,.1) 92%,rgba(250,247,241,.42) 100%),
    linear-gradient(180deg,rgba(250,247,241,.92) 0%,rgba(250,247,241,.12) 18%,
      rgba(250,247,241,0) 52%,rgba(250,247,241,.52) 84%,var(--paper) 100%);
}
.hero__inner{
  position:relative;z-index:1;width:100%;max-width:var(--wrap);
  margin-inline:auto;padding-inline:var(--gut);
  text-align:left;display:flex;flex-direction:column;align-items:flex-start;
}
.hero__badge{margin-bottom:22px}
.hero__title{
  font-size:clamp(36px,5.2vw,72px);line-height:1.1;
  font-weight:900;letter-spacing:-.015em;color:var(--ink);
  max-width:11em;
}
.hero__title em{font-style:normal;color:var(--wood-deep)}
.hero__sub{
  margin-top:22px;max-width:560px;
  font-size:clamp(14px,1.3vw,16px);line-height:1.85;
  color:var(--ink-2);
}
.hero__act{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}

.hero__stats{
  display:flex;flex-wrap:wrap;margin-top:40px;width:100%;max-width:720px;
}
.hero__stats li{
  flex:1 1 0;min-width:0;padding:0 clamp(14px,2vw,26px);
  border-left:1px solid var(--line);
}
.hero__stats li:first-child{padding-left:0;border-left:0}
.hero__stats b{
  display:block;font-size:clamp(26px,3vw,34px);font-weight:800;
  line-height:1;letter-spacing:-.02em;color:var(--ink);
}
.hero__stats b span{font-size:.5em;font-weight:700;margin-left:2px;letter-spacing:0}
.hero__stats small{display:block;margin-top:8px;font-size:11.5px;color:var(--ink-3);letter-spacing:.04em}

.hero__trust{
  margin-top:34px;
  display:flex;flex-direction:column;align-items:flex-start;gap:12px;
}
.hero__trust p{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3)}
.hero__trust ul{display:flex;flex-wrap:wrap;gap:8px}
.hero__trust li{
  font-size:12px;letter-spacing:.04em;color:var(--ink-2);
  border:1px solid var(--line-3);border-radius:999px;padding:7px 15px;
  background:rgba(255,253,249,.5);
  transition:border-color .3s,color .3s,background .3s;
}
.hero__trust li:hover{border-color:var(--wood);color:var(--wood-deep);background:var(--card)}

.hero__scroll{
  position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  font-family:var(--mono);font-size:8.5px;letter-spacing:.28em;color:var(--ink-3);
}
@media (max-height:940px){
  .hero__scroll{display:none}
}
.hero__scroll i{display:block;width:1px;height:30px;background:linear-gradient(var(--wood),transparent);animation:hint 2.4s var(--ease) infinite}
@keyframes hint{0%{transform:scaleY(.2);transform-origin:top;opacity:0}45%{transform:scaleY(1);opacity:1}100%{transform:scaleY(1);transform-origin:bottom;opacity:0}}

.only-d{display:inline}

/* ---------- 07 区块头 ---------- */
.sec-head{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:clamp(24px,5vw,80px);align-items:end;
  margin-bottom:clamp(40px,5.5vw,72px);
}
.sec-head__r{
  font-size:clamp(13.5px,1.25vw,15.5px);line-height:1.85;
  color:var(--ink-2);max-width:46ch;padding-bottom:6px;
}

/* ---------- 08 能力 ---------- */
.caps{border-top:1px solid var(--line)}
.cap{
  position:relative;padding:clamp(26px,3vw,38px) clamp(20px,2.4vw,32px) clamp(30px,3.4vw,42px);
  border-bottom:1px solid var(--line);border-left:1px solid var(--line-2);
  transition:background .4s var(--ease);
}
.cap:nth-child(3n+1){border-left:0}
.cap:hover{background:rgba(255,253,249,.85)}
.cap__icon{
  display:flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line-3);background:var(--card);margin-bottom:24px;
  transition:background .35s,border-color .35s;
}
.cap__icon svg{width:24px;height:24px;fill:none;stroke:var(--wood-deep);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.cap:hover .cap__icon{background:var(--wood-tint);border-color:var(--wood)}
.cap h3{font-size:19px;font-weight:700;letter-spacing:.02em;margin-bottom:10px}
.cap p{font-size:13.5px;line-height:1.85;color:var(--ink-2);max-width:34ch}
.cap__idx{
  position:absolute;top:clamp(26px,3vw,38px);right:clamp(20px,2.4vw,32px);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--ink-3);
}

/* ---------- 09 为什么 ---------- */
.why{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.78fr);gap:clamp(34px,5vw,84px);align-items:start}
.why__lead{
  margin-top:22px;font-size:clamp(14px,1.3vw,16px);line-height:1.9;
  color:var(--ink-2);max-width:52ch;
}
.bignum{
  display:flex;align-items:center;gap:22px;
  margin-top:clamp(30px,4vw,46px);padding:22px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.bignum span{
  font-size:clamp(48px,6vw,72px);font-weight:800;line-height:.9;
  letter-spacing:-.03em;color:var(--wood-deep);white-space:nowrap;
}
.bignum span small{
  font-size:.26em;font-weight:700;letter-spacing:.04em;
  margin-left:4px;vertical-align:super;
}
.bignum p{font-size:12.5px;line-height:1.75;color:var(--ink-2);letter-spacing:.02em}

.reasons{margin-top:6px}
.reasons li{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;
  padding:20px 0;border-bottom:1px solid var(--line-2);
}
.reasons li > span{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;
  color:var(--wood-deep);padding-top:4px;
}
.reasons h3{font-size:15.5px;font-weight:700;letter-spacing:.02em}
.reasons p{margin-top:6px;font-size:13px;line-height:1.8;color:var(--ink-2)}

.why__r{position:sticky;top:calc(var(--nav-h) + 24px)}
.why__media{position:relative;overflow:hidden;background:var(--paper-3)}
.why__media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;
  filter:saturate(.92) contrast(1.02);
}
.why__media figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:18px 20px;
  background:linear-gradient(transparent,rgba(43,38,32,.78));
  color:#fffdf8;display:flex;flex-direction:column;gap:4px;
}
.why__media b{font-size:13.5px;font-weight:700;letter-spacing:.04em}
.why__media span{font-size:11px;letter-spacing:.08em;color:rgba(255,253,248,.72)}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-top:0;background:var(--card)}
.mini-stats li{
  padding:16px 10px;text-align:center;border-left:1px solid var(--line);
  display:flex;flex-direction:column;gap:2px;
}
.mini-stats li:first-child{border-left:0}
.mini-stats b{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.mini-stats span{font-size:10.5px;color:var(--ink-3);letter-spacing:.04em}

/* ---------- 10 产品（跑马灯） ---------- */
.marquee{
  position:relative;overflow:hidden;padding-block:6px;
  mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent);
}
.marquee__track{display:flex;width:max-content;padding-inline:var(--gut)}
.marquee__group{display:flex;flex:none;gap:16px;padding-right:16px}
.js .marquee__track{animation:marquee 52s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

.pcard{
  width:clamp(250px,25vw,308px);flex:none;
  background:var(--card);border:1px solid var(--line-2);
  padding:14px 14px 20px;
  transition:border-color .35s,transform .35s var(--ease),box-shadow .35s;
}
.pcard:hover{border-color:var(--line-3);transform:translateY(-3px);box-shadow:0 20px 42px -30px rgba(43,38,32,.55)}
.pcard__media{position:relative;overflow:hidden;background:var(--paper-3);aspect-ratio:4/3}
.pcard__media img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease)}
.pcard:hover .pcard__media img{transform:scale(1.04)}
.pcard__media span{
  position:absolute;top:9px;right:9px;
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;
  background:rgba(250,247,241,.9);color:var(--ink);padding:3px 7px;
}
.pcard h3{margin-top:16px;font-size:16.5px;font-weight:700;letter-spacing:.02em}
.pcard p{margin-top:7px;font-size:12.5px;line-height:1.8;color:var(--ink-2)}
.pcard em{
  display:block;margin-top:12px;padding-top:12px;border-top:1px solid var(--line-2);
  font-style:normal;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;color:var(--ink-3);
  transition:color .3s;
}
.pcard:hover em{color:var(--wood-deep)}

.footnote{
  margin-top:clamp(26px,3.4vw,40px);
  font-size:12.5px;color:var(--ink-2);line-height:1.8;
  padding-top:18px;border-top:1px solid var(--line-2);
}

/* ---------- 11 风格 ---------- */
.styles{gap:1px;background:var(--line);border-block:1px solid var(--line)}
.style{display:block;background:var(--card);padding:0 0 26px;transition:background .4s var(--ease)}
.style:hover{background:#fffefb}
.style__media{position:relative;overflow:hidden;background:var(--paper-3)}
.style__media img{width:100%;aspect-ratio:4/5;object-fit:cover;transition:transform 1.1s var(--ease),filter .6s;filter:saturate(.96)}
.style:hover .style__media img{transform:scale(1.045);filter:saturate(1.04)}
.style__idx{
  position:absolute;top:12px;left:12px;
  font-family:var(--mono);font-size:10px;letter-spacing:.12em;
  background:rgba(250,247,241,.88);color:var(--ink);padding:4px 8px;
  backdrop-filter:blur(4px);
}
.style__text{padding:20px 20px 0}
.style__text h3{
  font-size:19px;font-weight:800;letter-spacing:.02em;
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
}
.style__text em{
  font-style:normal;font-family:var(--mono);font-size:8.5px;
  letter-spacing:.16em;color:var(--ink-3);font-weight:500;
}
.style__text p{margin-top:9px;font-size:13px;line-height:1.8;color:var(--ink-2)}

/* ---------- 12 案例 ---------- */
.works{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-2)}
.work{position:relative;overflow:hidden;background:var(--paper-3);margin:0}
.work img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform 1.2s var(--ease),filter .6s;filter:saturate(.88) contrast(1.02)}
.work:hover img{transform:scale(1.03);filter:saturate(1) contrast(1.02)}
.work__idx{
  position:absolute;top:14px;left:16px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;
  color:var(--ink);background:rgba(250,247,241,.86);
  padding:4px 8px;backdrop-filter:blur(4px);
}
.work figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:clamp(18px,2.4vw,30px);
  display:flex;flex-direction:column;gap:5px;color:#fffdf8;
  background:linear-gradient(transparent,rgba(43,38,32,.8));
}
.work__t{font-size:clamp(15px,1.5vw,19px);font-weight:700;letter-spacing:.02em}
.work__s{font-size:11.5px;letter-spacing:.06em;color:rgba(255,253,248,.72)}

/* ---------- 13 流程 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(5,1fr);
  gap:clamp(16px,2vw,28px);
  border-top:1px solid var(--line);padding-top:26px;
}
.steps li{position:relative}
.steps li::before{
  content:"";position:absolute;top:-27px;left:0;height:2px;width:0;
  background:var(--wood);transition:width .9s var(--ease);
}
.steps li.is-in::before{width:100%}
.steps span{
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--wood-deep);
  display:block;margin-bottom:14px;
}
.steps h3{font-size:clamp(15px,1.5vw,17.5px);font-weight:700;letter-spacing:.02em;margin-bottom:9px}
.steps p{font-size:12.5px;line-height:1.85;color:var(--ink-2)}

.certs{
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  margin-top:clamp(38px,5vw,60px);padding-top:24px;border-top:1px solid var(--line-2);
}
.certs > p{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);flex:none}
.certs ul{display:flex;flex-wrap:wrap;gap:8px}
.certs li{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--ink-2);
  border:1px solid var(--line);padding:6px 12px;background:var(--card);
}

/* ---------- 14 承诺 ---------- */
.promise{border-top:1px solid var(--line)}
.promise article{
  position:relative;
  padding:clamp(28px,3.2vw,40px) clamp(20px,2.4vw,32px);
  border-bottom:1px solid var(--line);border-left:1px solid var(--line-2);
}
.promise__idx{
  position:absolute;top:clamp(28px,3.2vw,40px);right:clamp(20px,2.4vw,32px);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--ink-3);
}
.promise article:first-child{border-left:0}
.tick{
  display:flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  background:var(--wood-tint);border:1px solid rgba(179,129,79,.42);
  margin-bottom:20px;
}
.tick svg{width:18px;height:18px;fill:none;stroke:var(--wood-deep);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.promise h3{font-size:clamp(16px,1.6vw,19px);font-weight:700;letter-spacing:.02em;margin-bottom:10px}
.promise p{font-size:13.5px;line-height:1.85;color:var(--ink-2);max-width:34ch}

/* ---------- 15 FAQ ---------- */
.faq{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1fr);gap:clamp(30px,5vw,80px);align-items:start}
.faq__note{margin-top:18px;font-size:13.5px;line-height:1.8;color:var(--ink-2)}
.faq__l .link-u{margin-top:24px}
.acc{border-top:1px solid var(--line)}
.acc__item{border-bottom:1px solid var(--line)}
.acc__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:21px 0;text-align:left;font-size:clamp(15px,1.5vw,17px);
  font-weight:600;letter-spacing:.01em;transition:color .3s;
}
.acc__q:hover{color:var(--wood-deep)}
.acc__q i{position:relative;width:13px;height:13px;flex:none}
.acc__q i::before,.acc__q i::after{
  content:"";position:absolute;background:currentColor;transition:transform .4s var(--ease),opacity .3s;
}
.acc__q i::before{left:0;top:6px;width:13px;height:1.5px}
.acc__q i::after{left:5.75px;top:0;width:1.5px;height:13px}
.acc__q[aria-expanded="true"] i::after{transform:rotate(90deg);opacity:0}
.acc__a{overflow:hidden;height:0;transition:height .42s var(--ease)}
.acc__a p{padding:0 36px 22px 0;font-size:13.5px;line-height:1.9;color:var(--ink-2);max-width:58ch}

/* ---------- 16 联系 ---------- */
.contact{
  position:relative;background:var(--paper-3);
  padding-block:var(--sect);overflow:hidden;
  border-top:1px solid var(--line-2);
}
.contact::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(70% 60% at 82% 8%,rgba(179,129,79,.16),transparent 68%);
}
.contact__inner{
  position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.86fr);
  gap:clamp(34px,5vw,80px);align-items:start;
}
.contact__lead{margin-top:20px;font-size:14.5px;line-height:1.9;color:var(--ink-2);max-width:46ch}
.contact__info{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;
  margin-top:clamp(34px,4.4vw,52px);padding-top:26px;border-top:1px solid var(--line);
}
.contact__info h3{font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--wood-deep);margin-bottom:8px}
.contact__info p{font-size:13.5px;line-height:1.7}
.contact__info p span{font-size:11.5px;color:var(--ink-2);letter-spacing:.02em}
.contact__qr{
  grid-column:1/-1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding-top:22px;border-top:1px solid var(--line-2);
}
.contact__qr > p{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1 1 180px}
.contact__qr b{font-size:13.5px}
.contact__qr p span{font-size:11.5px;line-height:1.7;color:var(--ink-2)}
.contact__range{grid-column:1/-1;padding-top:18px;border-top:1px solid var(--line-2)}
.contact__range p{font-size:12.5px;color:var(--ink-2);margin-top:6px}

/* 二维码卡：白底 + 细边，扫码区保持原比例 */
.qrcard-link{display:block;flex:none;transition:transform .3s var(--ease)}
.qrcard-link:hover{transform:translateY(-2px)}
.qrcard-link:hover .qrcard{border-color:var(--wood);box-shadow:0 14px 26px -20px rgba(43,38,32,.6)}
.qrcard{
  margin:0;flex:none;display:flex;align-items:center;gap:11px;
  background:#fff;border:1px solid var(--line);border-radius:3px;
  padding:8px 13px 8px 8px;
}
.qrcard img{width:96px;height:96px;flex:none;display:block}
.qrcard figcaption{display:flex;flex-direction:column;gap:3px;line-height:1.2}
.qrcard b{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink)}
.qrcard span{
  font-family:var(--mono);font-size:11px;letter-spacing:.02em;color:var(--ink-2);
  user-select:all;
}

.contact__form{
  background:var(--card);border:1px solid var(--line);
  padding:clamp(24px,3vw,36px);
  box-shadow:0 30px 70px -60px rgba(43,38,32,.6);
}
.field{margin-bottom:18px}
.field label{
  display:block;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:7px;
}
.field label span{color:var(--wood-deep);margin-left:3px}
.field input,.field textarea,.field select{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line-3);
  color:var(--ink);font-family:var(--sans);font-size:15px;padding:8px 0 10px;
  border-radius:0;appearance:none;-webkit-appearance:none;transition:border-color .3s;
}
.field textarea{resize:vertical;min-height:66px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3);font-size:13px}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-bottom-color:var(--wood)}
.field select{cursor:pointer}
.field select option{background:var(--card);color:var(--ink)}
.select{position:relative}
.select svg{position:absolute;right:2px;top:50%;transform:translateY(-50%);width:11px;height:7px;color:var(--ink-3);pointer-events:none}
.field.has-err input,.field.has-err textarea,.field.has-err select{border-bottom-color:var(--err)}
.field__err{
  font-size:11px;color:var(--err);margin-top:6px;opacity:0;transform:translateY(-3px);
  transition:opacity .25s,transform .25s;
}
.field.has-err .field__err{opacity:1;transform:none}
.form__note{font-size:11px;color:var(--ink-3);margin-top:14px;line-height:1.7}
.form__status{font-size:12.5px;margin-top:10px;min-height:1em;line-height:1.7;color:var(--wood-deep)}
.form__status.is-ok{color:var(--ok)}
.form__status.is-err{color:var(--err)}

/* ---------- 17 页脚 ---------- */
.foot{border-top:1px solid var(--line);padding-block:clamp(40px,5vw,64px) 26px;background:var(--paper-3)}
.foot__top{
  display:grid;grid-template-columns:1.2fr auto auto;
  gap:clamp(24px,4vw,64px);align-items:center;
  padding-bottom:clamp(32px,4vw,48px);border-bottom:1px solid var(--line);
}
.brand--foot .brand__cn{font-size:20px}
.foot__desc{margin-top:14px;font-size:12px;line-height:1.8;color:var(--ink-2)}
.foot__nav{display:flex;flex-wrap:wrap;gap:8px 22px}
.foot__nav a{font-size:12.5px;color:var(--ink-2);transition:color .3s}
.foot__nav a:hover{color:var(--ink)}
.foot__bar{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding-top:20px;font-size:11px;color:var(--ink-3);
}
.foot__beian a:hover{color:var(--ink-2)}

/* 移动端底部转化条 */
.mbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:none;gap:9px;padding:9px 12px calc(9px + env(safe-area-inset-bottom));
  background:rgba(250,247,241,.96);border-top:1px solid var(--line);
  backdrop-filter:blur(12px);
  transform:translateY(110%);transition:transform .4s var(--ease);
}
.mbar.is-show{transform:none}
.mbar__btn{flex:1;text-align:center;padding:13px 8px;border-radius:999px;font-size:13.5px;font-weight:600}
.mbar__btn--line{border:1px solid var(--line-3);color:var(--ink)}
.mbar__btn--solid{background:var(--wood-deep);color:#fffdf8;flex:1.4}

/* ---------- 18 响应式 ---------- */
@media (max-width:1080px){
  .why__r{position:static}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .cap:nth-child(3n+1){border-left:1px solid var(--line-2)}
  .cap:nth-child(2n+1){border-left:0}
  .promise article:nth-child(3){border-left:0}
  .steps{grid-template-columns:repeat(3,1fr);gap:28px 22px}
  .styles{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:900px){
  :root{--nav-h:66px}
  .nav__inner{grid-template-columns:1fr auto}
  .nav__links{display:none}
  .nav__burger{display:flex}
  .nav__act > .btn{display:none}

  .hero{padding-top:calc(var(--nav-h) + 30px)}
  .hero__sub br{display:none}
  .hero__stats{max-width:100%}

  .sec-head{grid-template-columns:1fr;gap:16px;align-items:start}
  .sec-head__r{max-width:none}

  .why{grid-template-columns:1fr;gap:36px}
  .why__r{order:-1}
  .why__media img{aspect-ratio:16/10}

  .works{grid-template-columns:1fr}
  .work img{aspect-ratio:16/10}

  .faq{grid-template-columns:1fr;gap:28px}
  .contact__inner{grid-template-columns:1fr}
  .contact{padding-bottom:calc(var(--sect) + 76px)}
  .foot__top{grid-template-columns:1fr;gap:24px}
  .mbar{display:flex}
  .foot{padding-bottom:92px}
}

@media (max-width:620px){
  .only-d{display:none}
  .hero{min-height:100svh;padding-bottom:92px}
  .hero__title{font-size:clamp(30px,8.6vw,40px);line-height:1.14}
  .hero__sub{margin-top:24px;font-size:13.5px}
  .hero__badge{margin-bottom:24px}
  .hero__scroll{display:none}
  .hero__bg::after{
    background:
      linear-gradient(180deg,rgba(250,247,241,.9) 0%,rgba(250,247,241,.56) 30%,
        rgba(250,247,241,.74) 68%,var(--paper) 97%),
      linear-gradient(97deg,rgba(250,247,241,.72),rgba(250,247,241,.34));
  }
  .hero__act{width:100%;gap:9px}
  .hero__act .btn{flex:1}
  .hero__stats{margin-top:32px}
  .hero__stats li{padding-inline:12px}
  .hero__stats b{font-size:22px}
  .hero__stats small{font-size:10px}
  .grid-3,.styles{grid-template-columns:1fr}
  .cap{border-left:0!important;padding-inline:0}
  .promise article{border-left:0;padding-inline:0}
  .steps{grid-template-columns:1fr;gap:0;padding-top:0;border-top:0}
  .steps li{padding:20px 0;border-bottom:1px solid var(--line-2)}
  .steps li::before{display:none}
  .steps span{margin-bottom:8px}
  .bignum{flex-direction:column;align-items:flex-start;gap:10px}
  .contact__info{grid-template-columns:1fr}
  .pcard{width:74vw}
  .marquee__track{gap:10px}
  .reasons li{grid-template-columns:34px minmax(0,1fr);gap:10px}
  .foot__bar{flex-direction:column;gap:6px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  [data-reveal]{opacity:1!important;transform:none!important}
  .js .marquee__track{animation:none}
}

@media (min-width:1600px){
  .hero__title{font-size:78px}
  .hero__sub{font-size:16.5px;max-width:600px}
  .hero__stats{max-width:720px}
  .hero__badge{font-size:12.5px}
}

/* ---------- 19 动效 ---------- */
.js [data-reveal]{
  opacity:0;transform:translateY(26px);
  transition:opacity .9s var(--ease),transform .9s var(--ease);
}
.js [data-reveal].is-in{opacity:1;transform:none}
.js .hero__title[data-reveal]:not(.is-in){transform:translateY(34px)}

/* ---------- 20 404 ---------- */
.p404{
  min-height:100svh;display:flex;flex-direction:column;
  background:var(--paper);padding-block:calc(var(--nav-h) + 74px) 36px;
}
.p404__inner{
  flex:1;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
}
.p404__code{
  font-size:clamp(84px,16vw,190px);font-weight:900;line-height:.86;letter-spacing:-.02em;
  color:rgba(179,129,79,.2);-webkit-text-stroke:2px rgba(140,95,55,.55);
  margin-bottom:clamp(14px,2vw,26px);
}
.p404 h1{font-size:clamp(26px,3.6vw,44px);font-weight:800;line-height:1.2;letter-spacing:-.01em}
.p404__lead{margin-top:16px;max-width:44ch;font-size:14.5px;line-height:1.85;color:var(--ink-2)}
.p404__act{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.p404__foot{margin-top:auto;padding-top:40px;font-size:11.5px;color:var(--ink-3);letter-spacing:.04em}

/* ---------- 21 悬浮联系（英文页） ---------- */
.fab{
  position:fixed;right:22px;bottom:22px;z-index:96;
  display:flex;flex-direction:column;align-items:flex-end;gap:10px;
}
.fab__btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;flex:none;
  background:var(--ink);color:var(--paper);
  box-shadow:0 16px 32px -16px rgba(43,38,32,.75);
  transition:background .3s var(--ease),transform .3s var(--ease),box-shadow .3s;
  -webkit-tap-highlight-color:transparent;
}
.fab__btn svg{width:25px;height:25px;display:block}
.fab__btn:hover,.fab__btn:focus-visible{background:var(--wood-deep);transform:translateY(-2px)}
.fab__btn:focus-visible{outline:2px solid var(--wood-deep);outline-offset:3px}
.fab__btn:active{transform:translateY(0)}
.fab__label{
  position:absolute;right:calc(100% + 10px);top:50%;
  transform:translateY(-50%) translateX(6px);
  padding:6px 11px;border-radius:999px;white-space:nowrap;
  background:var(--card);border:1px solid var(--line);
  font-size:11.5px;font-weight:500;letter-spacing:.04em;color:var(--ink);
  opacity:0;pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.fab__btn:hover .fab__label,.fab__btn:focus-visible .fab__label{opacity:1;transform:translateY(-50%)}

/* 微信二维码弹窗 */
.wxdialog{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}
.wxdialog[hidden]{display:none}
.wxdialog__mask{position:absolute;inset:0;background:rgba(43,38,32,.52);backdrop-filter:blur(3px)}
.wxdialog__box{
  position:relative;z-index:1;width:100%;max-width:316px;text-align:center;
  background:var(--card);border:1px solid var(--line);border-radius:6px;
  padding:30px 24px 22px;
  box-shadow:0 40px 90px -50px rgba(43,38,32,.95);
  animation:wxin .3s var(--ease);
}
@keyframes wxin{from{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:none}}
.wxdialog__box h3{font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--wood-deep)}
.wxdialog__box img{
  width:100%;max-width:206px;margin:16px auto 14px;display:block;
  background:#fff;border:1px solid var(--line);border-radius:4px;
  padding:0;
}
.wxdialog__box p{font-size:12.5px;line-height:1.75;color:var(--ink-2)}
.wxdialog__box p b{font-family:var(--mono);color:var(--ink);letter-spacing:.02em;user-select:all}
.wxdialog__close{
  position:absolute;top:8px;right:8px;width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-2);font-size:20px;line-height:1;
  transition:background .25s,color .25s;
}
.wxdialog__close:hover{background:var(--paper-2);color:var(--ink)}

@media (min-width:901px){
  /* 桌面端：底栏右侧让开悬浮按钮，保证备案号可见 */
  html.has-fab .foot__bar{padding-right:88px}
}
@media (max-width:900px){
  .fab{
    right:14px;bottom:calc(20px + env(safe-area-inset-bottom));gap:9px;
    transition:bottom .4s var(--ease);
  }
  /* 底部转化条滑出时同步上移，避免遮挡 */
  html.has-mbar .fab{bottom:calc(82px + env(safe-area-inset-bottom))}
  .fab__btn{width:46px;height:46px}
  .fab__btn svg{width:22px;height:22px}
  .fab__label{display:none}
  /* 页脚底部留出悬浮按钮的空间 */
  html.has-fab .foot{padding-bottom:200px}
}
@media (prefers-reduced-motion:reduce){
  .wxdialog__box{animation:none}
  .fab{transition:none}
}