/* Taben Studio — 一套安静的暗色。系统字体(国内能打开),单一强调色 = 旧日光灯的黄。 */
:root {
  color-scheme: dark;
  --ink: #0b0b0a;
  --ink-2: #121210;
  --line: #262521;
  --paper: #f2f0e8;
  --text: #cfccc2;
  --dim: #8a877d;
  --hum: #d9c77a;
  --tube: #f6f3e6;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --wrap: 1120px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ink); color: var(--text); font: 17px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--paper); text-decoration: none; }
a:hover { color: var(--hum); }
img { display: block; max-width: 100%; }
h1, h2, h3 { color: var(--paper); font-weight: 600; letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 .5em; }
h1 { font-size: clamp(40px, 7vw, 84px); }
h2 { font-size: clamp(28px, 3.6vw, 44px); }
h3 { font-size: 20px; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
.dim { color: var(--dim); }
.k { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--dim); margin: 0 0 16px; font-weight: 500; }
.mark { width: 22px; height: 22px; display: block; }

/* 顶栏 */
.top { position: fixed; inset: 0 0 auto; z-index: 10; display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(16px, 4vw, 40px); background: linear-gradient(to bottom, rgba(11,11,10,.85), rgba(11,11,10,0)); }
.brand { display: flex; align-items: center; gap: 12px; font-size: 16px; letter-spacing: -0.01em; color: var(--paper); }
.brand b { font-weight: 300; }
.top nav { display: flex; gap: clamp(14px, 3vw, 32px); font-size: 14px; }
.top nav a { color: var(--dim); }
.top nav a:hover, .top nav a.on { color: var(--paper); }

/* 首屏:一根灯管 + 暗场 */
.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; overflow: hidden;
  padding: 120px clamp(16px, 4vw, 40px) clamp(48px, 8vh, 96px); }
.hero.short { min-height: 78svh; }
.hero-media { position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(60% 45% at 50% 0%, rgba(217,199,122,.16), transparent 70%),
    radial-gradient(120% 80% at 50% 110%, rgba(0,0,0,.9), transparent 60%),
    linear-gradient(to bottom, #15140f, var(--ink) 75%); }
.hero-media.has-video { background: none; }
.hero-media video { width: 100%; height: 100%; object-fit: cover; opacity: .75; }
.tube { position: absolute; z-index: 1; top: 0; left: 50%; transform: translateX(-50%); width: min(520px, 70vw); height: 10px;
  background: var(--tube); border-radius: 0 0 6px 6px;
  box-shadow: 0 0 18px 4px rgba(246,243,230,.55), 0 0 90px 30px rgba(217,199,122,.22), 0 0 260px 120px rgba(217,199,122,.08);
  animation: hum 7s infinite steps(1); }
@keyframes hum { 0%, 61%, 63%, 64.5%, 100% { opacity: 1; } 62% { opacity: .35; } 64% { opacity: .7; } }
.flicker-hard { animation: dying 2.4s infinite steps(1); }
@keyframes dying { 0%, 12%, 40%, 44%, 100% { opacity: 1; } 10% { opacity: .1; } 42% { opacity: .2; } 70% { opacity: .05; } 73% { opacity: 1; } }
.hero-in { position: relative; z-index: 2; width: 100%; max-width: var(--wrap); margin: 0 auto; }
.hero h1 { max-width: 12ch; }
.lede { max-width: 38ch; font-size: clamp(18px, 2vw, 22px); color: var(--text); }

/* 按钮 */
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 24px; }
.btn { display: inline-block; padding: 14px 22px; background: var(--paper); color: var(--ink); font-size: 15px; font-weight: 600; border-radius: 2px; }
.btn:hover { background: var(--hum); color: var(--ink); }
.btn.ghost { background: transparent; color: var(--paper); box-shadow: inset 0 0 0 1px var(--line); }
.btn.ghost:hover { box-shadow: inset 0 0 0 1px var(--hum); color: var(--hum); }
.more { display: inline-block; margin-top: 8px; font-size: 15px; color: var(--hum); }

/* 分段 */
.band { padding: clamp(64px, 11vw, 140px) clamp(16px, 4vw, 40px); border-top: 1px solid var(--line); }
.band.tight { padding-top: 48px; padding-bottom: 48px; }
.band.dark { background: var(--ink-2); }
.band.center { text-align: center; }
.band.center .cta { justify-content: center; }
.wrap { max-width: var(--wrap); margin: 0 auto; }
.wrap.narrow { max-width: 720px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.page-head { padding: 180px clamp(16px, 4vw, 40px) 40px; }
.prose p { font-size: 18px; }
.prose .k { margin-top: 40px; }
.feat { list-style: none; padding: 0; margin: 0 0 1.4em; }
.feat li { padding: 14px 0; border-top: 1px solid var(--line); }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 20px 0; }
.tags li { font-size: 13px; padding: 4px 10px; border: 1px solid var(--line); color: var(--dim); }

.shots { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.shot { margin: 0; aspect-ratio: 16/9; background: var(--ink-2); overflow: hidden; }
.shot img { width: 100%; height: 100%; object-fit: cover; }
.ph { display: grid; place-items: center; border: 1px dashed var(--line); color: var(--dim); font-size: 13px; }

.req { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.req dl, .facts { display: grid; grid-template-columns: 130px 1fr; gap: 10px 20px; margin: 0; font-size: 15px; }
dt { color: var(--dim); }
dd { margin: 0; color: var(--paper); }

.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.principles p { color: var(--dim); }

.dl { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.dlcard { display: flex; flex-direction: column; justify-content: space-between; gap: 40px; min-height: 160px; padding: 20px;
  background: var(--ink); border: 1px solid var(--line); color: var(--paper); font-size: 14px; }
.dlcard .mark { width: 40px; height: 40px; }
.dlcard.ph { justify-content: flex-end; color: var(--dim); border-style: dashed; }

/* 页脚 */
.foot { border-top: 1px solid var(--line); padding: 48px clamp(16px, 4vw, 40px); font-size: 14px; }
.foot-in { max-width: var(--wrap); margin: 0 auto; display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.foot-in > div:first-child { display: flex; gap: 14px; }
.foot .mark { color: var(--dim); margin-top: 3px; }
.foot .cols { display: flex; gap: 28px; flex-wrap: wrap; }
.foot .cols a { color: var(--dim); }
.foot .cols a:hover { color: var(--paper); }

@media (max-width: 820px) {
  .two, .req, .principles { grid-template-columns: 1fr; }
  .shots { grid-template-columns: 1fr; }
  .dl { grid-template-columns: 1fr 1fr; }
  .top nav a:not(.on):nth-child(n+3) { display: none; }
  .req dl, .facts { grid-template-columns: 110px 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .tube, .flicker-hard { animation: none; }
}