/* =========================================================
   layout.css —— 页面骨架：进度条 / 导航 / Hero / 版块容器 / Footer
   ========================================================= */

/* ============ 1. 顶部进度条 ============ */
.progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--brand-deep),var(--brand) 60%,var(--sand));
  box-shadow:0 0 14px rgba(255,106,43,.6);transition:width .1s linear}

/* ============ 2. 导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .5s var(--ease),backdrop-filter .5s,border-color .5s,transform .5s var(--ease);
  border-bottom:1px solid transparent}
.nav.solid{background:rgba(11,13,16,.72);backdrop-filter:blur(18px) saturate(160%);border-bottom-color:var(--line)}
.nav.up{transform:translateY(-102%)}
.nav-in{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-size:26px;letter-spacing:.01em;line-height:1}
.brand b{font-weight:400}
.brand i{font-style:normal;color:var(--brand)}
.brand-mark{width:30px;height:30px;flex:none;border-radius:9px;border:1px solid var(--line-strong);
  display:grid;place-items:center;background:linear-gradient(160deg,rgba(255,106,43,.18),rgba(255,106,43,.02))}
.brand-mark svg{width:16px;height:16px;color:var(--brand)}

.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{position:relative;padding:8px 13px;font-size:14px;color:var(--paper-dim);border-radius:10px;transition:color .3s,background .3s}
.nav-links a:hover{color:var(--paper);background:rgba(244,241,234,.06)}
.nav-cta{display:inline-flex;align-items:center;gap:8px;margin-left:8px;padding:9px 17px;border-radius:999px;
  border:1px solid var(--line-strong);font-size:14px;transition:.35s var(--ease)}
.nav-cta:hover{border-color:var(--brand);color:var(--brand);background:rgba(255,106,43,.08)}
.nav-cta svg{width:14px;height:14px}

/* 移动端菜单开关（默认隐藏，仅窄屏显示） */
.nav-toggle{display:none;width:38px;height:38px;border-radius:11px;border:1px solid var(--line-strong);
  align-items:center;justify-content:center;margin-left:auto;flex:none}
.nav-toggle span{position:relative;display:block;width:17px;height:1.5px;background:var(--paper);border-radius:2px;transition:transform .35s var(--ease),background .2s}
.nav-toggle span::before,.nav-toggle span::after{content:'';position:absolute;left:0;width:17px;height:1.5px;background:var(--paper);border-radius:2px;transition:transform .35s var(--ease),opacity .2s}
.nav-toggle span::before{top:-5.5px}
.nav-toggle span::after{top:5.5px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-5.5px) rotate(-45deg)}

/* 移动端展开的导航面板 */
.nav-mobile{display:none;position:fixed;top:72px;left:0;right:0;z-index:49;
  background:rgba(11,13,16,.96);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);
  padding:14px var(--pad) 22px}
.nav-mobile.open{display:block}
.nav-mobile a{display:block;padding:13px 4px;font-size:16px;color:var(--paper-dim);border-bottom:1px solid var(--line)}
.nav-mobile a:last-child{border-bottom:0;color:var(--brand)}

@media(max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
}

/* ============ 3. Hero ============ */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:clamp(94px,11.5vh,138px) 0 clamp(96px,10.5vh,132px);isolation:isolate;overflow:hidden}
.hero-bg{
  position:absolute;inset:-8% -4%;z-index:-2;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1600 900' preserveAspectRatio='xMidYMid slice'%3E%3Cdefs%3E%3ClinearGradient id='g1' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop offset='0' stop-color='%23141820'/%3E%3Cstop offset='.5' stop-color='%230E1116'/%3E%3Cstop offset='1' stop-color='%2308090C'/%3E%3C/linearGradient%3E%3CradialGradient id='g2' cx='.78' cy='.28' r='.62'%3E%3Cstop offset='0' stop-color='%23FF6A2B' stop-opacity='.38'/%3E%3Cstop offset='1' stop-color='%23FF6A2B' stop-opacity='0'/%3E%3C/radialGradient%3E%3CradialGradient id='g3' cx='.12' cy='.85' r='.5'%3E%3Cstop offset='0' stop-color='%232E5A6B' stop-opacity='.34'/%3E%3Cstop offset='1' stop-color='%232E5A6B' stop-opacity='0'/%3E%3C/radialGradient%3E%3ClinearGradient id='g4' x1='0' y1='1' x2='1' y2='0'%3E%3Cstop offset='0' stop-color='%23E8C39E' stop-opacity='.16'/%3E%3Cstop offset='1' stop-color='%23E8C39E' stop-opacity='0'/%3E%3C/linearGradient%3E%3Cpattern id='grid' width='80' height='80' patternUnits='userSpaceOnUse'%3E%3Cpath d='M80 0H0v80' fill='none' stroke='%23F4F1EA' stroke-opacity='.055' stroke-width='1'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='1600' height='900' fill='url(%23g1)'/%3E%3Crect width='1600' height='900' fill='url(%23grid)'/%3E%3Crect width='1600' height='900' fill='url(%23g2)'/%3E%3Crect width='1600' height='900' fill='url(%23g3)'/%3E%3Crect width='1600' height='900' fill='url(%23g4)'/%3E%3Cg fill='none' stroke='%23FF6A2B' stroke-linecap='round'%3E%3Cpath d='M1600 900A560 560 0 0 0 1040 340' stroke-opacity='.3' stroke-width='1.4'/%3E%3Cpath d='M1600 900A420 420 0 0 0 1180 480' stroke-opacity='.22' stroke-width='1.4'/%3E%3Cpath d='M1600 900A280 280 0 0 0 1320 620' stroke-opacity='.16' stroke-width='1.4'/%3E%3Cpath d='M1600 900A140 140 0 0 0 1460 760' stroke-opacity='.1' stroke-width='1.4'/%3E%3C/g%3E%3Cg stroke='%23F4F1EA' stroke-opacity='.07' stroke-width='1'%3E%3Cpath d='M0 640h1600M0 700h1600'/%3E%3C/g%3E%3C/svg%3E");
  background-size:cover;background-position:center;
  will-change:transform;
}
.hero-mask{position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(120% 90% at 50% 8%,transparent 30%,rgba(11,13,16,.55) 78%,rgba(11,13,16,.9) 100%),
    linear-gradient(180deg,rgba(11,13,16,.82) 0%,rgba(11,13,16,.42) 34%,rgba(11,13,16,.72) 68%,var(--ink) 97%);
}
.hero-glow{position:absolute;z-index:-1;border-radius:50%;filter:blur(90px);pointer-events:none;
  width:min(52vw,620px);aspect-ratio:1;right:-8vw;top:6vh;
  background:radial-gradient(circle,rgba(255,106,43,.28),transparent 68%);animation:drift 16s var(--ease-io) infinite alternate}
.hero-glow.b{right:auto;left:-14vw;top:auto;bottom:-16vh;width:min(46vw,520px);
  background:radial-gradient(circle,rgba(124,150,164,.24),transparent 70%);animation-duration:21s}
@keyframes drift{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(-4%,5%,0) scale(1.14)}}

.hero-inner{position:relative;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad);width:100%}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.92fr);
  gap:clamp(24px,2.8vw,46px);align-items:center}
.hero-copy{max-width:640px}

/* Hero 右侧视觉：左「信号源」+ 右「浮动卡片」 */
/*
  修正（2026-10-27）：
  原来 max-width:620px 固定、grid 第二列 1fr 也不约束子项宽度，
  导致卡片按自身 max-width:340px 摆放并溢出容器右边界
  （实测 1280px 视口溢出 25px、980px 视口溢出 99px；
   被 body 的 overflow-x:hidden 掩盖，表现为内容被裁切）。
  现在：
    ① 容器 max-width 用 min(620px,100%)，宽度永远受父级约束；
    ② 第二列改用 minmax(0,1fr)，允许子项收缩；
    ③ 卡片加 min-width:0，长文本不会撑破。
*/
.hero-visual{position:relative;width:100%;max-width:min(620px,100%);margin-inline:auto;aspect-ratio:1/1;justify-self:center;
  display:grid;grid-template-columns:47% minmax(0,1fr);grid-template-rows:repeat(3,minmax(0,1fr));
  column-gap:6%;align-items:center}
.hero-visual > *{min-width:0}
.hero-visual .pulse{position:relative;grid-column:1;grid-row:1/-1;width:100%;aspect-ratio:1;align-self:center}
.hero-visual .ring{position:absolute;top:50%;left:50%;width:56%;aspect-ratio:1;margin:0;transform:translate(-50%,-50%);
  border:1px solid rgba(255,106,43,.4);border-radius:50%;opacity:0;animation:ringOut 4.8s linear infinite}
.hero-visual .ring.r2{animation-delay:1.6s}
.hero-visual .ring.r3{animation-delay:3.2s}
@keyframes ringOut{0%{transform:translate(-50%,-50%) scale(.55);opacity:0}
  16%{opacity:.7}100%{transform:translate(-50%,-50%) scale(2.9);opacity:0}}
.hero-visual .core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:44%;aspect-ratio:1;border-radius:28px;display:grid;place-items:center;
  border:1px solid rgba(255,106,43,.5);background:linear-gradient(150deg,rgba(255,106,43,.32),rgba(255,106,43,.05));
  box-shadow:0 0 80px -14px rgba(255,106,43,.75);backdrop-filter:blur(10px);z-index:2}
.hero-visual .core svg{width:44%;color:var(--brand)}
.hero-visual .grid-lines{position:absolute;inset:0;border-radius:50%;opacity:.6;
  background:
    repeating-linear-gradient(90deg,rgba(244,241,234,.06) 0 1px,transparent 1px 12.5%),
    repeating-linear-gradient(0deg,rgba(244,241,234,.06) 0 1px,transparent 1px 12.5%);
  -webkit-mask:radial-gradient(circle,#000 18%,transparent 68%);mask:radial-gradient(circle,#000 18%,transparent 68%)}

@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr}
  .hero-copy{max-width:none}
  .hero-visual{display:none}
}
@media(max-height:720px){.hero-visual{max-width:400px}}
@media(max-height:620px){.hero-visual{display:none}}

.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:7px 15px 7px 11px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(244,241,234,.04);backdrop-filter:blur(10px);
  font-size:12.5px;letter-spacing:.06em;color:var(--paper-dim)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 0 rgba(255,106,43,.7);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,106,43,.6)}70%{box-shadow:0 0 0 11px rgba(255,106,43,0)}100%{box-shadow:0 0 0 0 rgba(255,106,43,0)}}

h1.logo{font-family:var(--font-display);font-weight:400;line-height:.92;letter-spacing:-.02em;
  font-size:clamp(54px,min(10.4vw,18vh),190px);margin:24px 0 0}
h1.logo .bang{color:var(--brand);display:inline-block;animation:tilt 5.5s var(--ease-io) infinite}
@keyframes tilt{0%,72%,100%{transform:rotate(0)}78%{transform:rotate(11deg)}84%{transform:rotate(-6deg)}90%{transform:rotate(3deg)}}
/* 标语：加宽上限，避免「埋 / 没」这类生硬断行 */
.tagline{font-size:clamp(20px,2.4vw,32px);line-height:1.45;letter-spacing:.01em;margin-top:22px;max-width:22ch;color:var(--paper)}
.tagline em{font-style:normal;color:var(--sand);white-space:nowrap}
.lede{margin-top:16px;max-width:46ch;font-size:clamp(14.5px,1.3vw,16.5px);color:var(--paper-dim);line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(28px,3.4vh,40px)}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;margin-top:clamp(28px,3.6vh,46px);padding-top:22px;
  border-top:1px solid var(--line)}
.hero-meta span{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.04em;color:var(--paper-faint)}
.hero-meta svg{width:15px;height:15px;color:var(--brand);opacity:.9}

/* 首屏底部：状态 + 下拉指示 */
.hero-foot{position:absolute;left:0;right:0;bottom:0;z-index:2;width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:0 var(--pad) clamp(18px,2.8vh,30px);display:grid;grid-template-columns:1fr auto 1fr;align-items:end;gap:16px;
  pointer-events:none}
.hero-status{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.03em;color:var(--paper-faint)}
.hero-status .dot{width:5px;height:5px;flex:none}
.hero-status .sep{width:1px;height:11px;background:var(--line-strong);flex:none}
.scroll-cue{display:flex;flex-direction:column;align-items:center;gap:10px;justify-self:center}
.mouse{width:24px;height:38px;border:1.5px solid var(--line-strong);border-radius:13px;position:relative;background:rgba(244,241,234,.03);backdrop-filter:blur(6px)}
.mouse::after{content:'';position:absolute;left:50%;top:8px;width:3px;height:7px;border-radius:2px;background:var(--brand);
  transform:translateX(-50%);animation:wheel 1.9s var(--ease-io) infinite}
@keyframes wheel{0%{opacity:0;transform:translate(-50%,0)}18%{opacity:1}70%{opacity:0;transform:translate(-50%,13px)}100%{opacity:0;transform:translate(-50%,13px)}}
.cue-txt{font-size:10px;letter-spacing:.34em;text-transform:uppercase;color:var(--paper-faint)}
@media(max-width:900px){.hero-status{display:none}.hero-foot{grid-template-columns:1fr}}
@media(max-height:700px){.mouse{height:32px}}

/* ============ 4. 通用版块 ============ */
section{position:relative}
.sec{padding:clamp(88px,11vw,150px) 0}
.sec-head{max-width:820px;margin-bottom:clamp(44px,5vw,72px)}
.kicker{display:inline-flex;align-items:center;gap:9px;font-size:11.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--brand);margin-bottom:20px}
.kicker::before{content:'';width:26px;height:1px;background:currentColor;opacity:.6}
h2{font-size:clamp(30px,4.6vw,58px);line-height:1.14;letter-spacing:-.025em;font-weight:700}
h2 .serif{font-family:var(--font-display);font-weight:400;letter-spacing:0;color:var(--sand)}
h2 .block{display:block}
.sec-sub{margin-top:22px;font-size:clamp(15px,1.4vw,17.5px);color:var(--paper-dim);line-height:1.85;max-width:640px}
.rule{height:1px;background:linear-gradient(90deg,var(--line-strong),transparent)}

/* ============ 5. Footer ============ */
footer{position:relative;border-top:1px solid var(--line);padding:clamp(52px,6vw,80px) 0 34px;background:linear-gradient(180deg,transparent,rgba(255,106,43,.05))}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr auto;gap:clamp(28px,4vw,48px)}
@media(max-width:900px){.f-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.f-grid{grid-template-columns:1fr}}
.f-brand .brand{margin-bottom:16px}
.f-brand p{font-size:14px;color:var(--paper-faint);line-height:1.8;max-width:340px}
.f-col h5{font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--paper-faint);margin-bottom:16px;font-weight:600}
.f-col ul{display:grid;gap:11px}
.f-col a{font-size:14px;color:var(--paper-dim);transition:color .3s,transform .3s var(--ease);display:inline-block}
.f-col a:hover{color:var(--brand);transform:translateX(3px)}
.f-rss{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.f-title{font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--paper-faint);margin:0 0 2px;font-weight:600}
.rss-btn{display:inline-flex;align-items:center;gap:11px;padding:13px 20px;border-radius:14px;
  border:1px solid rgba(255,106,43,.4);background:rgba(255,106,43,.09);color:#FFC4A6;font-size:14px;font-weight:600;
  transition:.45s var(--ease)}
.rss-btn:hover{background:rgba(255,106,43,.18);transform:translateY(-3px);box-shadow:0 16px 34px -18px rgba(255,106,43,.8)}
.rss-btn svg{width:19px;height:19px;color:var(--brand);animation:wobble 3.4s var(--ease-io) infinite}
@keyframes wobble{0%,80%,100%{transform:scale(1)}88%{transform:scale(1.14)}}
.rss-url{font-family:var(--font-mono);font-size:11.5px;color:var(--paper-faint);word-break:break-all}
.f-bot{margin-top:clamp(38px,4vw,58px);padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;justify-content:space-between;font-size:13px;color:var(--paper-faint)}
.f-bot .links{display:flex;flex-wrap:wrap;gap:8px 20px}
.f-bot a:hover{color:var(--brand)}
.to-top{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--paper-dim)}
.to-top svg{width:14px;height:14px;transition:transform .4s var(--ease)}
.to-top:hover svg{transform:translateY(-4px)}