/* =========================================================
   AI 智慧榜样屏 · 解决方案展示站
   视觉：头图红金 → 内容区深红 / 米白 / 暖金
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --red-900:#540D0D;
  --red-800:#77131A;
  --red-700:#8E1A1C;
  --red-600:#A82422;
  --red-tint:#F6E7E2;

  --gold:#B08A46;
  --gold-ink:#7A5C22;
  --gold-lt:#D8BD8B;
  --gold-glow:rgba(216,189,139,.55);

  --cream:#F8F3E9;
  --cream-2:#F1E8D8;
  --paper:#FFFCF5;

  --ink:#1F1719;
  --ink-2:#463A3B;
  --muted:#7C6C67;
  --line:rgba(119,19,26,.13);
  --line-gold:rgba(176,138,70,.34);

  /* 标题：思源黑体（子集内嵌，与 banner 字样一致的方正黑体） */
  --display:"HansDisplay","Source Han Sans SC","Noto Sans SC","Source Han Sans CN","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;

  --pad:clamp(20px,5vw,72px);
  --maxw:1240px;
  --sec-y:clamp(64px,8.5vw,124px);
  --r:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  color:var(--ink-2);
  background:var(--cream);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* 纸张颗粒 + 极淡红晕：避免纯色平铺 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
  mix-blend-mode:multiply;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);font-weight:700;line-height:1.22;margin:0;letter-spacing:.005em}
h1,h2{font-weight:900}
p,figure,figcaption,blockquote{margin:0}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
:focus-visible{outline:2px solid var(--red-700);outline-offset:3px;border-radius:1px}
.on-dark :focus-visible{outline-color:var(--gold-lt)}
.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}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad);position:relative;z-index:1}

/* ---------- 3. 顶栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:80;
  background:rgba(248,243,233,.92);
  backdrop-filter:saturate(1.4) blur(14px);
  -webkit-backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .35s var(--ease),background .35s var(--ease);
}
.topbar.is-stuck{box-shadow:0 1px 0 var(--line-gold),0 12px 30px -22px rgba(84,13,13,.5)}
.topbar__in{
  max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad);
  height:70px;display:flex;align-items:center;gap:clamp(12px,3vw,40px);
  transition:height .35s var(--ease);
}
.topbar.is-stuck .topbar__in{height:60px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;min-height:44px}
.brand__seal{
  width:30px;height:30px;flex:0 0 auto;border-radius:2px;
  background:linear-gradient(150deg,var(--red-600),var(--red-800));
  color:var(--gold-lt);font-family:var(--display);font-size:13px;font-weight:700;
  display:grid;place-items:center;letter-spacing:0;
  box-shadow:inset 0 0 0 1px rgba(216,189,139,.45);
}
.brand__txt{font-family:var(--display);font-size:17px;font-weight:900;color:var(--ink);letter-spacing:.03em;line-height:1.2}
.brand__txt small{display:block;font-family:var(--sans);font-size:10px;font-weight:400;letter-spacing:.22em;color:var(--muted);margin-top:2px}
.nav{display:flex;align-items:center;gap:clamp(4px,1.4vw,26px);margin-left:auto}
.nav a{
  position:relative;font-size:14.5px;color:var(--ink-2);padding:10px 4px;
  min-height:44px;display:inline-flex;align-items:center;letter-spacing:.02em;
  transition:color .2s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:4px;right:4px;bottom:12px;height:1px;
  background:var(--red-700);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav a:hover{color:var(--red-700)}
.nav a:hover::after,.nav a[aria-current="true"]::after{transform:scaleX(1)}
.nav a[aria-current="true"]{color:var(--red-700);font-weight:600}
.topbar__cta{
  flex:0 0 auto;margin-left:6px;
  display:inline-flex;align-items:center;gap:8px;
  min-height:40px;padding:0 18px;border-radius:2px;
  background:var(--red-800);color:#F7EEDD;
  font-size:14px;letter-spacing:.06em;
  box-shadow:inset 0 0 0 1px rgba(216,189,139,.35);
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.topbar__cta:hover{background:var(--red-900);transform:translateY(-1px)}
.burger{
  display:none;width:44px;height:44px;margin-left:auto;
  align-items:center;justify-content:center;color:var(--ink);
}
.burger span{display:block;width:20px;height:1.5px;background:currentColor;position:relative;transition:.3s var(--ease)}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:1.5px;background:currentColor;transition:.3s var(--ease)}
.burger span::before{top:-6px}.burger span::after{top:6px}
.burger[aria-expanded="true"] span{background:transparent}
.burger[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.burger[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

@media (max-width:940px){
  .nav{
    position:fixed;inset:70px 0 auto;flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);border-bottom:1px solid var(--line-gold);
    padding:8px var(--pad) 18px;margin:0;
    box-shadow:0 24px 40px -28px rgba(84,13,13,.6);
    transform:translateY(-8px);opacity:0;pointer-events:none;visibility:hidden;
    transition:.3s var(--ease);
  }
  .nav.is-open{transform:none;opacity:1;pointer-events:auto;visibility:visible}
  .nav a{padding:15px 2px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .topbar__cta{display:none}
  .burger{display:flex}
  .brand__txt small{display:none}
}

/* ---------- 4. 头图 ---------- */
.hero{position:relative;overflow:hidden;background:var(--red-800)}
.hero__frame{position:relative;aspect-ratio:2172/724;max-height:72vh;overflow:hidden}
.hero__img{
  width:100%;height:100%;object-fit:cover;object-position:center;
  animation:heroIn 1.4s var(--ease) both;
}
@keyframes heroIn{from{transform:scale(1.035);opacity:.55}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){
  .hero__img{animation:none}
}
.hero__fade{
  position:absolute;left:0;right:0;bottom:0;height:34%;
  background:linear-gradient(to bottom,rgba(84,13,13,0),rgba(84,13,13,.55));
  pointer-events:none;
}

@media (max-width:760px){
  .hero__frame{aspect-ratio:auto;height:clamp(190px,52vw,300px);max-height:none}
  .hero__img{object-position:6% center;animation-duration:1s}
  .hero__fade{height:26%}
}

/* ---------- 5. 命题带（深红） ---------- */
.claim{
  position:relative;background:var(--red-800);color:#F3E6D4;
  padding-block:clamp(44px,6vw,76px) clamp(40px,5.5vw,64px);
  overflow:hidden;
}
.claim::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 8% 0%,rgba(168,36,34,.85),transparent 62%),
    radial-gradient(90% 120% at 100% 100%,rgba(84,13,13,.9),transparent 60%);
}
.claim::after{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold-glow) 22%,var(--gold-glow) 78%,transparent);
}
.claim__grid{display:block}
.claim__kicker{
  font-size:11.5px;letter-spacing:.34em;color:var(--gold-lt);margin-bottom:16px;
}
.claim h1{
  font-size:clamp(26px,3.6vw,44px);color:#FFF8EB;line-height:1.36;letter-spacing:.01em;font-weight:900;
  text-wrap:balance;max-width:17em;
}
.claim h1 em{
  font-style:normal;color:var(--gold-lt);
  background:linear-gradient(180deg,transparent 76%,rgba(216,189,139,.26) 76%);
}
.claim__lead{
  margin-top:18px;font-size:15.5px;line-height:1.85;color:rgba(246,232,213,.76);max-width:44ch;
}


/* ---------- 6. 章节通用 ---------- */
.sec{position:relative;padding-block:var(--sec-y);scroll-margin-top:78px}
#top,.hero{scroll-margin-top:0}
.sec--tight{padding-block:clamp(48px,6vw,86px)}
.sec--dark{background:var(--red-900);color:rgba(246,232,213,.8)}
.sec--paper{background:var(--paper)}

.sec-head{position:relative;margin-bottom:clamp(32px,4.6vw,64px)}
.sec-head__rule{
  display:flex;align-items:center;gap:12px;margin-bottom:22px;
}
.sec-head__rule::before{content:"";width:7px;height:7px;background:var(--gold);transform:rotate(45deg);flex:0 0 auto}
.sec-head__rule span{
  font-size:11px;letter-spacing:.26em;color:var(--gold-ink);white-space:nowrap;
}
.sec-head__rule::after{content:"";height:1px;flex:1;background:linear-gradient(90deg,var(--line-gold),transparent)}
.sec-head h2{
  font-size:clamp(26px,4.1vw,44px);letter-spacing:.005em;max-width:20em;text-wrap:balance;font-weight:900;
}
.sec-head__lead{
  margin-top:16px;font-size:15.5px;line-height:1.85;color:var(--muted);max-width:46ch;
}
.sec-head__ghost{
  position:absolute;right:0;top:-.32em;z-index:0;
  font-family:var(--display);font-weight:900;
  font-size:clamp(90px,15vw,190px);line-height:1;
  color:rgba(176,138,70,.1);
  pointer-events:none;user-select:none;
  letter-spacing:.02em;
}
.sec--dark .sec-head__ghost{color:rgba(216,189,139,.11)}
.sec--dark .sec-head__rule span{color:var(--gold-lt)}
.sec--dark .sec-head h2{color:#FFF7EA}
.sec--dark .sec-head__lead{color:rgba(246,232,213,.66)}
.sec--dark .sec-head__rule::after{background:linear-gradient(90deg,rgba(216,189,139,.5),transparent)}
@media (max-width:700px){
  .sec-head__ghost{font-size:64px;top:-.62em;right:-.06em;opacity:.6}
  .sec-head__lead{max-width:none}
}

/* 揭示动画 */
.js .reveal{opacity:0;transform:translateY(18px)}
.js .reveal.in{opacity:1;transform:none;transition:opacity .85s var(--ease),transform .85s var(--ease)}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none}
}

/* ---------- 7. 产品构成 ---------- */
.compose{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.part{
  position:relative;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(24px,2.8vw,38px) clamp(20px,2.4vw,32px) clamp(20px,2.2vw,28px);
  display:flex;flex-direction:column;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease);
  overflow:hidden;
}
.part::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--red-700),var(--gold));
  transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease);
}
.part:hover{transform:translateY(-4px);box-shadow:0 22px 48px -34px rgba(84,13,13,.55);border-color:var(--line-gold)}
.part:hover::before{transform:scaleX(1)}
.part__idx{
  width:38px;height:38px;border-radius:50%;flex:0 0 auto;
  display:grid;place-items:center;
  font-family:var(--display);font-size:15px;font-weight:700;color:var(--red-800);
  border:1px solid var(--line-gold);background:var(--cream-2);
  position:relative;
}
.part__idx::after{
  content:"";position:absolute;inset:-5px;border-radius:50%;
  border:1px solid rgba(176,138,70,.18);
}
.part h3{font-size:clamp(19px,2.1vw,23px);margin-top:20px;letter-spacing:.04em}
.part__en{font-size:10.5px;letter-spacing:.24em;color:var(--gold-ink);margin-top:7px;text-transform:uppercase}
.part ul{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:11px}
.part li{
  position:relative;padding-left:16px;font-size:15px;line-height:1.65;color:var(--ink-2);
}
.part li::before{
  content:"";position:absolute;left:0;top:.62em;width:5px;height:5px;
  border:1px solid var(--gold);transform:rotate(45deg);
}
.part__tag{
  margin-top:auto;padding-top:20px;
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--red-700);letter-spacing:.04em;
  border-top:1px dashed var(--line-gold);margin-block:22px 0;
}
.part__tag b{
  font-weight:400;font-size:10.5px;letter-spacing:.16em;color:#FFF6E6;
  background:var(--red-800);padding:3px 7px;border-radius:1px;
}
@media (max-width:900px){.compose{grid-template-columns:1fr}}

/* ---------- 8. 产品实景 ---------- */
.switch{
  display:inline-flex;padding:4px;gap:4px;margin-bottom:clamp(18px,2.4vw,28px);
  background:var(--cream-2);border:1px solid var(--line-gold);border-radius:2px;
}
.switch button{
  min-height:44px;padding:0 clamp(14px,2.4vw,26px);border-radius:1px;
  font-size:14.5px;letter-spacing:.06em;color:var(--ink-2);
  display:inline-flex;align-items:center;gap:9px;
  transition:background .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease);
}
.switch button i{
  width:6px;height:6px;border-radius:50%;border:1px solid currentColor;opacity:.5;transition:.3s var(--ease)
}
.switch button[aria-selected="true"]{
  background:var(--red-800);color:#FFF6E6;box-shadow:0 6px 18px -12px rgba(84,13,13,.9)
}
.switch button[aria-selected="true"] i{background:var(--gold-lt);border-color:var(--gold-lt);opacity:1}
.switch button:hover{color:var(--red-800)}
.switch button[aria-selected="true"]:hover{color:#FFF6E6}

.stage{
  position:relative;border:1px solid var(--line);
  background:#E7DCC9;overflow:hidden;border-radius:var(--r);
  aspect-ratio:5893/2559;
}
.stage img{
  width:100%;height:100%;object-fit:cover;
  transition:opacity .5s var(--ease),transform .9s var(--ease);
  position:absolute;inset:0;
}
.stage img[hidden]{display:block;opacity:0;pointer-events:none}
.stage img:not([hidden]){animation:stageIn .6s var(--ease) both}
@keyframes stageIn{from{opacity:0;transform:scale(1.012)}to{opacity:1;transform:none}}
.stage-fig{margin:0}
.stage__cap{
  display:flex;gap:16px;align-items:baseline;flex-wrap:wrap;
  margin-top:14px;padding-top:14px;
  border-top:1px solid var(--line);
  font-size:12.5px;letter-spacing:.04em;
}
.stage__cap b{font-family:var(--display);font-size:14.5px;letter-spacing:.05em;color:var(--ink)}
.stage__cap span{color:var(--muted);font-size:12px;letter-spacing:.06em}
@media (max-width:700px){
  .stage{aspect-ratio:auto;height:clamp(180px,56vw,300px)}
  .stage img{object-position:center}
  .stage__cap{margin-top:12px;padding-top:12px;gap:6px}
  .stage__cap b{font-size:13.5px}
  .stage__cap span{font-size:11.5px}
}

/* 硬件 */
.hardware{
  margin-top:clamp(28px,3.6vw,52px);
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(24px,4vw,56px);align-items:center;
}
.hardware__fig{
  position:relative;background:var(--paper);border:1px solid var(--line);
  padding:clamp(10px,1.6vw,22px);border-radius:var(--r);
  display:grid;grid-template-columns:1fr 1fr;gap:8px;
}
.hardware__fig img{mix-blend-mode:multiply;width:100%}
.hardware__fig img:last-child{align-self:center}
.hardware__note{
  position:absolute;left:12px;bottom:10px;font-size:10.5px;letter-spacing:.14em;
  color:var(--muted);
}
.hardware h3{font-size:clamp(20px,2.3vw,26px);line-height:1.45;letter-spacing:.03em}
.hardware__sub{margin-top:12px;font-size:14.5px;color:var(--muted);line-height:1.8}
.specs{
  list-style:none;margin:22px 0 0;padding:0;
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border-top:1px solid var(--line);
}
.specs li{
  padding:13px 0;border-bottom:1px solid var(--line);
  display:flex;flex-direction:column;gap:3px;
}
.specs li:nth-child(odd){padding-right:16px}
.specs b{font-family:var(--display);font-size:15.5px;color:var(--ink);font-weight:700;letter-spacing:.02em}
.specs span{font-size:12.5px;color:var(--muted);letter-spacing:.02em}
@media (max-width:820px){
  .hardware{grid-template-columns:1fr;gap:24px}
  .hardware__fig{grid-template-columns:1fr;gap:0}
  .hardware__fig img:last-child{display:none}
}

/* ---------- 9. 控制系统 ---------- */
.sys{display:grid;grid-template-columns:minmax(240px,.72fr) minmax(0,1.6fr);gap:clamp(24px,3.4vw,48px);align-items:start}
.sys__nav{display:flex;flex-direction:column;border-top:1px solid rgba(216,189,139,.26);align-self:stretch}
.sys__nav button{
  display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:baseline;
  text-align:left;padding:15px 14px 15px 4px;min-height:56px;
  border-bottom:1px solid rgba(216,189,139,.16);
  color:rgba(246,232,213,.74);
  transition:color .28s var(--ease),background .28s var(--ease),padding .28s var(--ease);
  position:relative;
}
.sys__nav button i{
  font-family:var(--display);font-style:normal;font-size:12.5px;letter-spacing:.06em;
  color:var(--gold);opacity:.7;transition:.28s var(--ease);
}
.sys__nav button b{font-weight:500;font-size:15.5px;letter-spacing:.03em;display:block}
.sys__nav button small{display:block;font-size:12px;color:rgba(246,232,213,.6);margin-top:4px;letter-spacing:.02em;line-height:1.5}
.sys__nav button::before{
  content:"";position:absolute;left:0;top:50%;width:2px;height:0;background:var(--gold);
  transform:translateY(-50%);transition:height .3s var(--ease);
}
.sys__nav button:hover{color:#FFF6E6;background:rgba(255,255,255,.03)}
.sys__nav button[aria-selected="true"]{color:#FFF6E6;background:rgba(255,255,255,.055);padding-left:14px}
.sys__nav button[aria-selected="true"]::before{height:60%}
.sys__nav button[aria-selected="true"] small{color:rgba(246,232,213,.82)}
.sys__nav button[aria-selected="true"] i{opacity:1}

.sys__panels{min-width:0}
.panel[hidden]{display:none}
.panel{animation:panelIn .45s var(--ease) both}
@keyframes panelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.panel{animation:none}}

.shot{
  position:relative;border:1px solid rgba(216,189,139,.28);
  background:#141A24;border-radius:2px;overflow:hidden;
  box-shadow:0 40px 70px -50px rgba(0,0,0,.9);
}
.shot img{width:100%;display:block}
.shot figcaption{
  padding:12px clamp(12px,1.6vw,18px);
  font-size:12.5px;color:rgba(246,232,213,.6);
  border-top:1px solid rgba(216,189,139,.18);
  background:rgba(0,0,0,.28);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.shot figcaption em{font-style:normal;color:var(--gold-lt);letter-spacing:.1em;font-size:11px}

/* 主截图 + 点击放大 */
.shot--main{border-color:rgba(216,189,139,.34)}
.shot__btn{display:block;width:100%;padding:0;position:relative;cursor:zoom-in;background:none}
.shot__btn img{width:100%;display:block;transition:filter .3s var(--ease)}
.shot__btn:hover img{filter:brightness(1.06)}
.shot__hint{
  position:absolute;right:10px;top:10px;
  display:inline-flex;align-items:center;gap:6px;
  font-size:10.5px;letter-spacing:.12em;color:#FFF5E4;
  background:rgba(10,12,16,.66);border:1px solid rgba(216,189,139,.44);
  padding:5px 10px;border-radius:100px;
  opacity:0;transform:translateY(-4px);
  transition:.28s var(--ease);pointer-events:none;
}
.shot__hint::before{
  content:"";width:8px;height:8px;border:1.4px solid currentColor;border-radius:50%;
  box-shadow:0 0 0 1.5px rgba(10,12,16,.66);
}
.shot__btn:hover .shot__hint,.shot__btn:focus-visible .shot__hint{opacity:1;transform:none}
@media (hover:none){.shot__hint{opacity:1;transform:none}}

/* 缩略图切换 */
.thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.thumb{
  position:relative;flex:0 0 auto;width:clamp(120px,14vw,184px);
  padding:0;border:1px solid rgba(216,189,139,.26);border-radius:2px;
  overflow:hidden;background:#0F151D;cursor:pointer;
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.thumb img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;object-position:center 18%;display:block;opacity:.5;transition:opacity .25s var(--ease)}
.thumb span{
  position:absolute;left:0;right:0;bottom:0;
  font-size:11px;letter-spacing:.03em;color:#F6E8D5;text-align:left;
  background:rgba(8,10,14,.78);padding:3px 6px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.thumb:hover{border-color:rgba(216,189,139,.6)}
.thumb:hover img{opacity:.8}
.thumb.is-on{border-color:var(--gold-lt)}
.thumb.is-on img{opacity:1}
.panel__txt{margin-top:24px}
.panel__txt h3{font-size:clamp(18px,2vw,22px);color:#FFF7EA;letter-spacing:.03em}
.panel__txt p{margin-top:10px;font-size:14.5px;line-height:1.8;color:rgba(246,232,213,.66)}
.panel__pts{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:9px}
.panel__pts li{position:relative;padding-left:15px;font-size:13.5px;line-height:1.7;color:rgba(246,232,213,.72)}
.panel__pts li::before{content:"";position:absolute;left:0;top:.68em;width:5px;height:5px;border:1px solid var(--gold);transform:rotate(45deg)}
@media (max-width:980px){
  .sys{grid-template-columns:1fr;gap:20px}
  .sys__nav{
    flex-direction:row;overflow-x:auto;border-top:0;
    border-bottom:1px solid rgba(216,189,139,.24);
    scrollbar-width:none;-ms-overflow-style:none;
    gap:2px;
  }
  .sys__nav::-webkit-scrollbar{display:none}
  .sys__nav button{
    flex:0 0 auto;min-width:152px;padding:12px 16px;border-bottom:0;
    grid-template-columns:1fr;gap:4px;
    border-top:2px solid transparent;
  }
  .sys__nav button i{display:none}
  .sys__nav button small{display:none}
  .sys__nav button::before{display:none}
  .sys__nav button[aria-selected="true"]{border-top-color:var(--gold);background:rgba(255,255,255,.05);padding-left:16px}
  .thumbs{flex-wrap:nowrap}
  .thumb{width:calc(50% - 4px)}
}

/* ---------- 10. 演示视频 ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:clamp(20px,2.6vw,32px)}
.filters button{
  min-height:40px;padding:0 16px;border-radius:100px;
  border:1px solid rgba(216,189,139,.42);
  font-size:13.5px;letter-spacing:.06em;color:rgba(246,232,213,.82);
  transition:.28s var(--ease);
}
.filters button:hover{border-color:var(--gold-lt);color:#FFF6E6}
.filters button[aria-pressed="true"]{background:var(--gold-lt);border-color:var(--gold-lt);color:#4E1414;font-weight:600}
.filters button .n{font-size:11px;opacity:.6;margin-left:5px}

.vgrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(14px,1.8vw,24px)}
@media (max-width:1020px){.vgrid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:760px){
  .vgrid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .vcard figcaption b{font-size:13.5px;min-height:2.7em;letter-spacing:0}
}

.vcard{margin:0}
.vcard__btn{
  position:relative;display:block;width:100%;padding:0;
  aspect-ratio:9/16;overflow:hidden;border-radius:3px;
  background:#2A0C0C;border:1px solid rgba(216,189,139,.28);
  transition:border-color .35s var(--ease),transform .45s var(--ease),box-shadow .45s var(--ease);
}
.vcard__btn img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease),filter .4s var(--ease)}
.vcard__btn::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(40,6,6,.62),rgba(40,6,6,.05) 46%);
  transition:opacity .35s var(--ease);
}
.vcard__btn:hover{border-color:var(--gold-lt);transform:translateY(-3px);box-shadow:0 26px 44px -34px #000}
.vcard__btn:hover img{transform:scale(1.045)}
.vcard__play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:52px;height:52px;border-radius:50%;z-index:2;
  display:grid;place-items:center;
  background:rgba(255,247,234,.14);
  border:1px solid rgba(255,247,234,.7);
  backdrop-filter:blur(4px);
  transition:.35s var(--ease);
}
.vcard__play::before{
  content:"";width:0;height:0;margin-left:3px;
  border-left:12px solid #FFF7EA;border-block:7.5px solid transparent;
}
.vcard__btn:hover .vcard__play{background:var(--gold-lt);border-color:var(--gold-lt);transform:translate(-50%,-50%) scale(1.06)}
.vcard__btn:hover .vcard__play::before{border-left-color:#4E1414}
.vcard__dur{
  position:absolute;right:9px;top:9px;z-index:2;
  font-size:11px;letter-spacing:.06em;color:#FFF5E4;
  background:rgba(30,4,4,.62);padding:2px 7px;border-radius:2px;
  font-variant-numeric:tabular-nums;
}
.vcard__cat{
  position:absolute;left:9px;top:9px;z-index:2;
  font-size:10.5px;letter-spacing:.1em;color:#FFF5E4;
  background:rgba(30,4,4,.55);border:1px solid rgba(255,245,228,.28);
  padding:2px 7px;border-radius:2px;
}
.vcard figcaption{padding:12px 2px 0}
.vcard figcaption b{
  display:block;font-family:var(--display);font-size:15px;color:#FFF7EA;
  font-weight:700;letter-spacing:.03em;line-height:1.4;
}
.vcard figcaption span{display:block;font-size:12px;color:rgba(246,232,213,.64);margin-top:4px;letter-spacing:.02em}
/* 点击后的播放容器 */
.vwrap{position:relative;overflow:hidden;background:#000;border:1px solid var(--gold-lt);border-radius:3px}
.vwrap--vertical{aspect-ratio:9/16}
.vwrap--wide{position:absolute;inset:0;z-index:4;border:0;border-radius:0}
.vwrap video{width:100%;height:100%;display:block;object-fit:contain;background:#000}
.vwrap__spin{
  position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:2;
  font-size:11.5px;letter-spacing:.14em;color:#FFF5E4;
  background:rgba(30,4,4,.7);border:1px solid rgba(216,189,139,.4);
  padding:5px 12px;border-radius:100px;white-space:nowrap;
  transition:opacity .4s var(--ease);
  pointer-events:none;
}
.vwrap__spin::before{
  content:"";display:inline-block;width:9px;height:9px;margin-right:7px;
  border:1.5px solid rgba(216,189,139,.35);border-top-color:var(--gold-lt);
  border-radius:50%;vertical-align:-1px;
  animation:spin .8s linear infinite;
}
.vwrap__spin.is-error::before{display:none}
.vwrap.is-ready .vwrap__spin{opacity:0}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.vwrap__spin::before{animation:none}}
.vcard.is-hidden{display:none}

.vnote{
  margin-top:clamp(24px,3vw,38px);padding-top:20px;
  border-top:1px solid rgba(216,189,139,.2);
  font-size:12.5px;color:rgba(246,232,213,.66);letter-spacing:.03em;
}

/* ---------- 11. 方案配置 ---------- */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px clamp(16px,2vw,22px);margin-bottom:clamp(22px,3vw,34px);
  background:var(--red-tint);border-left:2px solid var(--red-700);
  border-radius:0 2px 2px 0;
}
.notice b{font-size:13px;color:var(--red-800);letter-spacing:.06em;white-space:nowrap;font-family:var(--sans)}
.notice p{font-size:13.5px;color:var(--ink-2);line-height:1.7}
@media (max-width:600px){.notice{flex-direction:column;gap:6px}}

.tbl-wrap{border:1px solid var(--line);background:var(--paper);overflow:hidden;border-radius:var(--r)}
table.spec{width:100%;border-collapse:collapse;font-size:14.5px}
table.spec caption{text-align:left;padding:18px clamp(14px,2vw,24px);border-bottom:1px solid var(--line)}
table.spec caption b{font-family:var(--display);font-size:17px;color:var(--ink);letter-spacing:.03em}
table.spec caption span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
table.spec thead th{
  text-align:left;padding:11px clamp(12px,1.6vw,20px);
  font-size:11px;letter-spacing:.18em;color:var(--gold-ink);
  font-weight:400;background:var(--cream-2);
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.spec tr.group th{
  padding:11px clamp(12px,1.6vw,20px);
  background:var(--cream-2);
  border-block:1px solid var(--line);
  font-family:var(--display);font-size:13.5px;color:var(--red-800);
  letter-spacing:.18em;font-weight:700;text-align:left;
}
table.spec tr.group th span{
  font-family:var(--sans);font-size:11.5px;color:#6B5C58;
  letter-spacing:.04em;margin-left:10px;font-weight:400;
}
table.spec tbody tr.item{border-bottom:1px solid var(--line)}
table.spec tbody tr.item:last-child{border-bottom:0}
table.spec tbody tr.item:hover{background:rgba(241,232,216,.5)}
table.spec td{padding:clamp(14px,1.8vw,22px) clamp(12px,1.6vw,20px);vertical-align:top}
td.c-name{width:24%;min-width:150px}
td.c-name b{font-family:var(--display);font-size:16px;color:var(--ink);letter-spacing:.02em;display:block;line-height:1.5}
td.c-name em{
  font-style:normal;display:inline-block;margin-top:8px;
  font-size:11.5px;letter-spacing:.04em;color:var(--muted);
  border:1px solid var(--line-gold);padding:2px 7px;border-radius:2px;
}
td.c-spec ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
td.c-spec li{position:relative;padding-left:13px;font-size:13.5px;line-height:1.65;color:var(--ink-2)}
td.c-spec li::before{content:"";position:absolute;left:0;top:.7em;width:4px;height:4px;background:var(--gold);border-radius:50%}
td.c-qty{width:13%;min-width:92px;white-space:nowrap}
td.c-qty b{font-family:var(--display);font-size:19px;color:var(--red-800)}
td.c-qty span{font-size:12.5px;color:var(--muted);margin-left:2px}

@media (max-width:820px){
  table.spec thead{display:none}
  table.spec,table.spec tbody,table.spec tr,table.spec td,table.spec th{display:block;width:auto}
  table.spec{display:block;width:100%}
  table.spec caption{display:block;width:100%;padding:16px}
  table.spec caption b{font-size:16px;line-height:1.5}
  table.spec caption span{margin-top:6px;line-height:1.6}
  table.spec tr.group th{padding:10px 16px;border-top:1px solid var(--line)}
  table.spec tr.group:first-of-type th{border-top:0}
  table.spec tr.group th span{display:block;margin:4px 0 0;letter-spacing:.02em}
  table.spec tbody tr.item{
    padding:16px;border-bottom:1px solid var(--line);
    display:grid;grid-template-columns:1fr auto;gap:2px 12px;
  }
  table.spec td{padding:0}
  td.c-name{grid-column:1;min-width:0;width:auto}
  td.c-name b{font-size:16.5px}
  td.c-name em{margin-top:6px}
  td.c-qty{grid-column:2;grid-row:1;text-align:right;min-width:0;width:auto;align-self:start}
  td.c-qty b{font-size:17px}
  td.c-spec{grid-column:1/-1;margin-top:10px}
  td.c-spec li{font-size:13px}
}

/* ---------- 12. 落地案例 ---------- */
.case{
  position:relative;overflow:hidden;border-radius:var(--r);
  border:1px solid var(--line);background:#E4D8C4;
}
.case--video{width:100%;aspect-ratio:16/9}
.case img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform .8s var(--ease);
}
.case:hover img{transform:scale(1.03)}
.case__cap{
  position:absolute;inset:auto 0 0;padding:clamp(24px,3.4vw,44px) clamp(12px,1.6vw,20px) clamp(12px,1.6vw,18px);
  background:linear-gradient(to top,rgba(40,6,6,.9) 0%,rgba(40,6,6,.72) 45%,rgba(40,6,6,0) 100%);
  color:#FFF5E4;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
}
.case__cap b{font-family:var(--display);font-size:clamp(14px,1.35vw,16.5px);letter-spacing:.04em}
.case__cap span{font-size:11.5px;color:rgba(255,245,228,.7);letter-spacing:.1em}

/* 案例照片轮播 */
.case-gallery{margin-top:clamp(14px,1.8vw,22px)}
.cg-view{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r);background:#E4D8C4;
}
.cg-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center 46%;
  opacity:0;transform:scale(1.035);
  transition:opacity .9s var(--ease),transform 8s linear;
  will-change:opacity,transform;
}
.cg-img.is-on{opacity:1;transform:scale(1)}

.cg-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;margin-top:14px;
}
.cg-cap{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.cg-name{
  font-family:var(--display);font-weight:700;font-size:clamp(15px,1.5vw,17px);
  color:var(--ink);letter-spacing:.03em;
}
.cg-sub{font-size:12px;color:var(--muted);letter-spacing:.06em}
.cg-right{display:flex;align-items:center;gap:12px}
.cg-dots{display:flex;align-items:center}
.cg-dot{
  width:32px;height:44px;padding:0;display:grid;place-items:center;
  background:none;border:0;cursor:pointer;
}
.cg-dot::before{
  content:"";display:block;width:7px;height:7px;border-radius:50%;
  background:rgba(119,19,26,.24);
  transition:width .35s var(--ease),background .35s var(--ease),border-radius .35s var(--ease);
}
.cg-dot:hover::before{background:rgba(119,19,26,.5)}
.cg-dot.is-on::before{width:22px;border-radius:3px;background:var(--red-800)}
.cg-count{
  font-size:11.5px;letter-spacing:.16em;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
@media (prefers-reduced-motion:reduce){
  .cg-img{transition:opacity .3s linear;transform:none}
}
@media (max-width:700px){
  .cg-view{aspect-ratio:4/3}
  .cg-bar{gap:10px}
  .cg-dot{width:28px}
  .cg-count{font-size:11px}
}

/* ---------- 13. 页脚 ---------- */
.foot{background:var(--red-900);color:rgba(246,232,213,.6);position:relative;overflow:hidden}
.foot::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(90% 130% at 82% 0%,rgba(168,36,34,.55),transparent 58%);
}
.foot__top{
  padding-block:clamp(48px,6vw,84px) clamp(34px,4.4vw,56px);
  border-bottom:1px solid rgba(216,189,139,.2);
}
.foot h2{
  color:#FFF7EA;font-size:clamp(24px,3.2vw,38px);line-height:1.36;letter-spacing:.01em;text-wrap:balance;font-weight:900;
  max-width:16em;
}
.foot__lead{margin-top:16px;font-size:14.5px;line-height:1.85;max-width:44ch}
.foot__bottom{
  padding-block:22px 26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;letter-spacing:.05em;color:rgba(246,232,213,.58);
}
.foot a{color:rgba(216,189,139,.86)}
.foot a:hover{color:#FFF7EA}
@media (max-width:700px){
  .foot__bottom{
    justify-content:flex-start;gap:8px;font-size:11.5px;
    padding-bottom:74px;      /* 给右下角「回到顶部」留位，避免压住文字 */
  }
}

/* 回到顶部 */
.to-top{
  position:fixed;right:clamp(14px,2.4vw,28px);bottom:clamp(14px,2.4vw,28px);z-index:60;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(119,19,26,.92);color:#F6E8D5;
  border:1px solid rgba(216,189,139,.45);
  box-shadow:0 14px 28px -18px rgba(0,0,0,.7);
  opacity:0;pointer-events:none;transform:translateY(8px);
  transition:.35s var(--ease);
}
.to-top.in{opacity:1;pointer-events:auto;transform:none}
.to-top::before{content:"";width:8px;height:8px;border-left:1.5px solid currentColor;border-top:1.5px solid currentColor;transform:rotate(45deg) translate(2px,2px)}


/* ---------- 14. 图片放大 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:200;
  display:flex;align-items:center;justify-content:center;
  padding:clamp(14px,3.4vw,52px);
  background:radial-gradient(120% 100% at 50% 0%,rgba(30,6,6,.96),rgba(10,3,3,.985));
  opacity:0;pointer-events:none;transition:opacity .32s var(--ease);
}
.lightbox.is-open{opacity:1;pointer-events:auto}
.lightbox[hidden]{display:none}
.lightbox__img{
  max-width:100%;max-height:calc(100dvh - 132px);
  width:auto;height:auto;object-fit:contain;
  border:1px solid rgba(216,189,139,.32);
  box-shadow:0 50px 90px -40px rgba(0,0,0,.95);
  transform:scale(.985);transition:transform .32s var(--ease);
}
.lightbox.is-open .lightbox__img{transform:none}
.lightbox__cap{
  position:absolute;left:0;right:0;bottom:clamp(10px,2vw,20px);
  text-align:center;font-size:12.5px;letter-spacing:.08em;
  color:rgba(246,232,213,.72);
}
.lightbox__cap b{font-family:var(--display);font-weight:700;color:#FFF6E6;margin-right:10px;letter-spacing:.04em}
.lightbox__close{
  position:absolute;top:clamp(10px,2vw,20px);right:clamp(10px,2vw,20px);
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid rgba(216,189,139,.42);background:rgba(12,4,4,.6);
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.lightbox__close::before,.lightbox__close::after{
  content:"";position:absolute;width:16px;height:1.5px;background:#F6E8D5;
}
.lightbox__close::before{transform:rotate(45deg)}
.lightbox__close::after{transform:rotate(-45deg)}
.lightbox__close:hover{background:rgba(168,36,34,.7);border-color:var(--gold-lt)}
body.is-locked{overflow:hidden}

/* ---------- 15. 视频网格中的「海报轮播」卡 ---------- */
.vcard--poster .vcard__btn{cursor:pointer;background:#1B0A0A}
.vcard--poster .vcard__btn::after{
  background:linear-gradient(to top,rgba(38,6,6,.66) 0%,rgba(38,6,6,.16) 26%,rgba(38,6,6,0) 46%);
}
.vcard--poster .vcard__btn:hover img{transform:none}
.vcard--poster .vcard__btn:hover .vcard .vcard__poster.is-on{transform:scale(1.02)}
.vcard .vcard__poster{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;opacity:0;transform:scale(1.045);
  transition:opacity .9s var(--ease),transform 7s linear;
  will-change:opacity,transform;
}
.vcard .vcard__poster.is-on{opacity:1;transform:scale(1)}
.vcard__dots{
  position:absolute;left:50%;bottom:12px;transform:translateX(-50%);z-index:3;
  display:flex;align-items:center;gap:6px;
  padding:5px 9px;border-radius:100px;
  background:rgba(22,4,4,.52);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  box-shadow:0 2px 10px -4px rgba(0,0,0,.6);
}
.vcard__dots i{
  width:5px;height:5px;border-radius:50%;
  background:rgba(255,245,228,.55);
  transition:width .35s var(--ease),background .35s var(--ease);
}
.vcard__dots i.is-on{width:15px;border-radius:3px;background:var(--gold-lt)}
@media (prefers-reduced-motion:reduce){
  .vcard .vcard__poster{transition:opacity .3s linear;transform:none}
}

/* ---------- 16. 横版海报演示（16:9 大屏轮播） ---------- */
.wide-demo{
  margin-top:clamp(44px,5.5vw,76px);
  padding-top:clamp(34px,4.4vw,54px);
  border-top:1px solid rgba(216,189,139,.22);
}
.wd-head{max-width:680px}
.wd-kicker{font-size:11px;letter-spacing:.24em;color:var(--gold-lt);margin-bottom:14px}
.nb{white-space:nowrap}
.wide-demo h3{
  color:#FFF7EA;font-size:clamp(20px,2.4vw,28px);
  font-weight:900;line-height:1.35;letter-spacing:.01em;max-width:16em;
}
.wd-stage{margin-top:clamp(22px,2.8vw,34px)}

.wd-screen{
  --pw:clamp(8px,1.1vw,14px);
  position:relative;box-sizing:border-box;width:100%;aspect-ratio:16/9;
  padding:var(--pw);border-radius:3px;
  background:linear-gradient(158deg,#E9D9B2 0%,#CBB275 45%,#E0C894 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255,248,232,.4),
    0 0 0 1px rgba(216,189,139,.3),
    0 46px 84px -46px #000,
    0 0 110px -40px rgba(255,176,112,.3);
}
.wd-view{
  position:relative;width:100%;height:100%;overflow:hidden;
  background:#0A0505;border-radius:1px;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.65),inset 0 3px 10px rgba(0,0,0,.5);
}
.wd-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center top;
  opacity:0;transform:scale(1.02);
  transition:opacity .9s var(--ease),transform 9s linear;
  will-change:opacity,transform;
}
.wd-img.is-on{opacity:1;transform:scale(1)}

.wd-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;margin-top:16px;
}
.wd-dots{display:flex;align-items:center;gap:0}
.wd-dot{
  width:34px;height:44px;padding:0;display:grid;place-items:center;
  background:none;border:0;cursor:pointer;
}
.wd-dot::before{
  content:"";display:block;width:7px;height:7px;border-radius:50%;
  background:rgba(255,245,228,.28);
  transition:width .35s var(--ease),background .35s var(--ease),border-radius .35s var(--ease);
}
.wd-dot:hover::before{background:rgba(255,245,228,.6)}
.wd-dot.is-on::before{width:22px;border-radius:3px;background:var(--gold-lt)}
.wd-meta{display:flex;align-items:baseline;gap:14px}
.wd-name{
  font-family:var(--display);font-weight:700;font-size:13.5px;
  color:#FFF6E6;letter-spacing:.03em;
}
.wd-count{
  font-size:11.5px;letter-spacing:.16em;color:rgba(246,232,213,.5);
  font-variant-numeric:tabular-nums;
}

@media (prefers-reduced-motion:reduce){
  .wd-img{transition:opacity .3s linear;transform:none}
}
@media (max-width:700px){
  .wide-demo{margin-top:clamp(36px,7vw,52px)}
  .wd-screen{--pw:6px}
  .wd-bar{gap:8px}
  .wd-dot{width:30px;height:44px}
  .wd-name{font-size:12.5px}
  .wd-count{font-size:11px}
}