/* MEILI AI v3 · components —— 交互组件 c-*（DESIGN-v3 §3）
   规则：只引用 tokens.css 里的变量；不用绝对定位把内容叠在文字上；所有尺寸用容器查询兜底。 */

/* ================================================================
   C01 吸顶导航
   ================================================================ */
.c-header {
  position: sticky; top: 0; z-index: var(--z-header);
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--d-2) var(--e-out), border-color var(--d-2) var(--e-out);
}
.c-header.is-stuck, html:not(.js) .c-header {
  background: var(--s0);
  border-bottom-color: var(--line-1);
}
.c-header__inner { display: flex; align-items: center; gap: var(--sp-5); height: 100%; }
.c-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--t1); flex: none; }
.c-brand:hover { color: var(--t1); }
.c-brand__mark { width: 30px; height: auto; flex: none; }
.c-brand__word { font: 700 var(--fs-small) / 1 var(--font-display); letter-spacing: .06em; }

.c-nav { flex: 1; }
.c-nav__list { display: flex; align-items: center; gap: 2px; }
.c-nav__link {
  position: relative; display: block; padding: 8px 12px;
  font: 500 var(--fs-small) / 1.2 var(--font-text);
  color: var(--t2); border-radius: var(--r-xs);
  transition: color var(--d-1) var(--e-out), background var(--d-1) var(--e-out);
}
.c-nav__link:hover { color: var(--t1); background: rgba(255, 255, 255, .05); }
.c-nav__link[aria-current="page"] { color: var(--t1); }
.c-nav__link[aria-current="page"]::after {
  content: ''; position: absolute; left: 12px; right: 12px; bottom: 1px; height: 2px;
  border-radius: 2px; background: var(--g-brand);
}
.c-header__aside { display: flex; align-items: center; gap: var(--sp-3); margin-left: auto; flex: none; }

.c-lang { position: relative; }
.c-lang__summary {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; height: 40px;
  font: 500 var(--fs-small) / 1 var(--font-text); color: var(--t2);
  border-radius: var(--r-pill); cursor: pointer; list-style: none;
}
.c-lang__summary::-webkit-details-marker { display: none; }
.c-lang__summary:hover { color: var(--t1); background: rgba(255, 255, 255, .05); }
.c-lang__caret { width: 0; height: 0; border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 5px solid currentColor; transition: transform var(--d-2) var(--e-out); }
.c-lang__details[open] .c-lang__caret { transform: rotate(180deg); }
.c-lang__list {
  position: absolute; right: 0; top: calc(100% + 6px); min-width: 132px; padding: 6px;
  background: var(--s3); border: 1px solid var(--line-2); border-radius: var(--r-sm);
  box-shadow: var(--shadow-pop); z-index: var(--z-drawer);
}
.c-lang__link, .c-lang__current-item { display: block; padding: 8px 12px; border-radius: var(--r-xs); font-size: var(--fs-small); color: var(--t2); }
.c-lang__link:hover { color: var(--t1); background: rgba(255, 255, 255, .06); }
.c-lang__current-item { color: var(--t1); font-weight: 600; }

.c-header__toggle {
  display: none; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--r-xs); color: var(--t1);
}
.c-header__toggle:hover { background: rgba(255, 255, 255, .06); }
.c-header__burger, .c-header__burger::before, .c-header__burger::after {
  display: block; width: 18px; height: 2px; border-radius: 2px; background: currentColor;
  transition: transform var(--d-2) var(--e-out), background var(--d-2) var(--e-out);
}
.c-header__burger { position: relative; }
.c-header__burger::before, .c-header__burger::after { content: ''; position: absolute; left: 0; }
.c-header__burger::before { top: -6px; }
.c-header__burger::after { top: 6px; }
.c-header__toggle[aria-expanded="true"] .c-header__burger { background: transparent; }
.c-header__toggle[aria-expanded="true"] .c-header__burger::before { transform: translateY(6px) rotate(45deg); }
.c-header__toggle[aria-expanded="true"] .c-header__burger::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1023px) {
  .c-header__toggle { display: inline-flex; margin-left: auto; }
  .c-header__aside { margin-left: 0; }
  .c-header .c-btn { display: none; }
  .c-nav {
    display: none; position: fixed; inset: var(--header-h) 0 0 0; z-index: var(--z-drawer);
    padding: var(--sp-6) var(--gutter) var(--sp-8); background: var(--s1); overflow-y: auto;
  }
  .c-nav.is-open { display: block; }
  .c-nav__list { flex-direction: column; align-items: stretch; gap: 4px; }
  .c-nav__link { padding: 14px 12px; font-size: var(--fs-h4); border-radius: var(--r-sm); }
  .c-nav__link[aria-current="page"] { background: var(--s2); }
  .c-nav__link[aria-current="page"]::after { display: none; }
  html:not(.js) .c-header__toggle { display: none; }
  html:not(.js) .c-nav { display: block; position: static; padding: 0; background: none; }
  html:not(.js) .c-header { height: auto; }
  html:not(.js) .c-header__inner { flex-wrap: wrap; padding-block: 10px; }
  html:not(.js) .c-nav__list { flex-direction: row; flex-wrap: wrap; }
}

/* ================================================================
   C02 按钮与链接
   ================================================================ */
.c-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 22px; border-radius: var(--r-pill);
  font: 600 var(--fs-small) / 1.2 var(--font-display); letter-spacing: .01em;
  white-space: nowrap; transition: filter var(--d-1) var(--e-out), background var(--d-1) var(--e-out), border-color var(--d-1) var(--e-out), transform var(--d-2) var(--e-out);
}
.c-btn--solid { background: var(--g-btn); color: #fff; }
.c-btn--solid:hover { color: #fff; filter: brightness(1.12); }
.c-btn--solid:active { transform: translateY(1px); }
.c-btn--ghost { border: 1px solid var(--line-ui); color: var(--t1); }
.c-btn--ghost:hover { color: var(--t1); border-color: var(--t-accent); background: rgba(56, 182, 242, .06); }
.c-btn--sm { min-height: 36px; padding: 0 14px; font-size: var(--fs-micro); }

.c-link {
  display: inline-flex; align-items: center; gap: 6px;
  font: 600 var(--fs-small) / 1.4 var(--font-display); color: var(--t-accent);
}
.c-link::after { content: '→'; transition: transform var(--d-2) var(--e-out); }
.c-link:hover { color: var(--t1); text-decoration: underline; text-underline-offset: 3px; }
.c-link:hover::after { transform: translateX(3px); }
.c-link--plain::after { content: none; }

/* ================================================================
   C03 芯片与标签
   ================================================================ */
.c-chip {
  display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 10px;
  border: 1px solid var(--line-2); border-radius: var(--r-pill);
  background: var(--s3); color: var(--t2);
  font: 500 var(--fs-micro) / 1 var(--font-text); white-space: nowrap;
}
.c-chip--sample { color: var(--t-indigo); border-color: var(--indigo-lift); background: rgba(87, 111, 219, .1); }
.c-chip--ai { color: var(--t-accent); border-color: rgba(56, 182, 242, .4); background: rgba(2, 139, 215, .1); }
.c-chip--ai::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-cyan); }
.c-chips { display: flex; flex-wrap: wrap; gap: 6px; }

.c-eyebrow {
  display: flex; align-items: center; gap: 10px;
  font: 500 var(--fs-micro) / 1.4 var(--font-text); color: var(--t3); letter-spacing: .04em;
}
.c-eyebrow .u-mono { color: var(--t4); }
.c-eyebrow::after { content: ''; flex: 1; height: 1px; background: var(--line-1); max-width: 120px; }
/* 强调词：用实色（WCAG 8.77:1）。渐变字一律不用 —— 文字必须保持单一实色。 */
.c-em { font-style: normal; color: var(--t-accent); }

/* ================================================================
   C05 区块头（左标题 + 右导语，取代居中大字）
   ================================================================ */
.c-head { display: grid; gap: var(--sp-4) var(--sp-7); align-items: end; margin-bottom: var(--sp-7); }
.c-head__title { margin-top: var(--sp-2); max-width: 18ch; }
.c-head__aside { display: grid; gap: var(--sp-4); align-content: end; }
.c-head__lead { font-size: var(--fs-lead); color: var(--t2); max-width: 46ch; }
@media (min-width: 1024px) {
  .c-head { grid-template-columns: minmax(0, 5fr) minmax(0, 1fr) minmax(0, 6fr); }
  .c-head__aside { grid-column: 3; justify-self: end; max-width: 44ch; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .c-head { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .c-head__aside { grid-column: 2; }
}

/* ================================================================
   C06 卡片 + 光标聚光
   ================================================================ */
.c-card {
  position: relative; isolation: isolate;
  padding: clamp(18px, 2vw, 26px);
  background: var(--s2); border: 1px solid var(--line-1); border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
  transition: border-color var(--d-2) var(--e-out), transform var(--d-2) var(--e-out);
}
.c-card::before {
  content: ''; position: absolute; inset: 0; z-index: -1; border-radius: inherit; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 30%) var(--my, 0%), var(--glow-blue), transparent 46%);
  opacity: 0; transition: opacity var(--d-2) var(--e-out);
}
.c-card:hover, .c-card:focus-within { border-color: var(--line-2); }
.c-card:hover::before, .c-card:focus-within::before { opacity: .55; }
.c-cards { display: grid; gap: var(--gap); }

/* ================================================================
   C08 Tile（AIGC 八格）—— 头 / 舞台 / 脚 三段，永不互相叠压
   ================================================================ */
.c-tile {
  display: grid; grid-template-rows: auto 1fr auto; gap: var(--sp-4);
  padding: clamp(16px, 4cqi, 22px);
  background: var(--s2); border: 1px solid var(--line-1); border-radius: var(--r-md);
  container-type: inline-size; min-width: 0;
}
.c-tile__head { display: grid; gap: 8px; }
.c-tile__num { font: 500 var(--fs-micro) / 1 var(--font-mono); color: var(--t4); }
.c-tile__title { font-size: var(--fs-h4); }
.c-tile__desc { font-size: var(--fs-small); color: var(--t2); line-height: 1.6; }
.c-tile__stage { display: grid; gap: 10px; align-content: start; min-width: 0; }
.c-tile__foot { display: grid; gap: 4px; padding-top: 10px; border-top: 1px solid var(--line-1); }
.c-tile__sample { font: 600 var(--fs-small) / 1.4 var(--font-display); color: var(--t1); }
.c-tile__meta { font-size: var(--fs-micro); color: var(--t3); }
@media (max-width: 767px) { .c-tile { padding: 16px; } }

/* ================================================================
   C09 图位 / 占位
   ================================================================ */
.c-slot {
  position: relative; width: 100%; aspect-ratio: var(--ratio, 16 / 9);
  border-radius: var(--r-sm); overflow: hidden; background: var(--s4);
}
.c-slot > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: var(--pos, 50% 50%); }
.c-slot__ph {
  position: absolute; inset: 0; display: grid; place-content: center; gap: 6px; text-align: center; padding: 10%;
  background:
    radial-gradient(circle, rgba(201, 208, 236, .12) 1px, transparent 1.6px) 0 0 / 12px 12px,
    radial-gradient(120% 90% at 85% 15%, rgba(2, 139, 215, .28), transparent 60%),
    radial-gradient(100% 80% at 10% 90%, var(--glow-indigo), transparent 60%), var(--s4);
}
.c-slot__use { font: 600 var(--fs-small) / 1.4 var(--font-display); color: var(--t1); }
.c-slot__spec { font: 500 var(--fs-micro) / 1.4 var(--font-mono); color: var(--t3); }
.c-slot--photo { border-radius: var(--r-md); box-shadow: var(--shadow-plate); }
.c-slot__cap { margin-top: 10px; font-size: var(--fs-micro); color: var(--t3); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ================================================================
   C10 设备外框
   ================================================================ */
.c-phone { width: min(100%, 250px); min-width: 190px; margin-inline: auto; padding: 7px; border-radius: 30px; background: var(--s3); border: 1px solid var(--line-2); }
.c-phone__screen { aspect-ratio: 9 / 19.5; border-radius: 24px; overflow: hidden; background: var(--s0); position: relative; }
.c-phone__screen > .c-slot { position: absolute; inset: 0; height: 100%; border-radius: 0; }
.c-browser { border-radius: var(--r-sm); overflow: hidden; border: 1px solid var(--line-2); background: var(--s3); }
.c-browser__bar { display: flex; align-items: center; gap: 6px; height: 30px; padding: 0 10px; border-bottom: 1px solid var(--line-1); }
.c-browser__dots { display: flex; gap: 4px; }
.c-browser__dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-3); }
.c-browser__url { font: 500 var(--fs-micro) / 1 var(--font-mono); color: var(--t4); margin-left: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.c-browser__body { position: relative; }
.c-browser__body > .c-slot { border-radius: 0; }

/* ================================================================
   C11 合作伙伴底板
   ================================================================ */
.c-plate {
  display: grid; place-items: center; aspect-ratio: 16 / 10; padding: 10% 12%;
  background: var(--plate); border-radius: var(--r-sm); box-shadow: var(--shadow-plate);
  min-height: 0; overflow: hidden;
}
.c-plate img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; }
.c-plate-wrap { display: grid; gap: 8px; min-width: 0; }
.c-plate-cap { display: flex; justify-content: space-between; gap: 8px; font-size: var(--fs-micro); color: var(--t3); }
.c-plate-cap b { font-weight: 600; color: var(--t2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ================================================================
   C12 跑马灯
   ================================================================ */
.c-marquee { position: relative; }
.c-marquee__head { display: flex; justify-content: flex-end; margin-bottom: 10px; }
.c-marquee__viewport { display: grid; gap: 12px; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent); mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent); }
.c-marquee__row { display: flex; }
.c-marquee__track { display: flex; gap: 12px; width: max-content; }
html.js-motion .c-marquee.is-ready .c-marquee__track { animation: mq 70s linear infinite; }
html.js-motion .c-marquee.is-ready .c-marquee__row--rev .c-marquee__track { animation-direction: reverse; }
html.js-motion .c-marquee.is-paused .c-marquee__track,
html.loops-paused .c-marquee .c-marquee__track { animation-play-state: paused; }
.c-marquee:hover .c-marquee__track, .c-marquee:focus-within .c-marquee__track { animation-play-state: paused; }
@keyframes mq { to { transform: translateX(-50%); } }
.c-marquee .c-plate { width: 168px; }
/* 无 JS / 减少动效：折行成静态网格，23 个全部可见 */
html:not(.js-motion) .c-marquee__viewport { overflow: visible; -webkit-mask-image: none; mask-image: none; }
html:not(.js-motion) .c-marquee__track { flex-wrap: wrap; width: auto; justify-content: center; }
html:not(.js-motion) .c-marquee__row--rev .c-marquee__track { justify-content: center; }
@media (max-width: 767px) { .c-marquee .c-plate { width: 128px; } }

/* ================================================================
   C13 光束连线
   ================================================================ */
.fx-wire { position: relative; }
.fx-wire svg { width: 100%; height: auto; max-width: 100%; overflow: visible; }
.fx-wire__path { fill: none; stroke: var(--line-2); stroke-width: 1.2; }
.fx-wire__lit { fill: none; stroke: url(#wireGrad); stroke-width: 1.6; stroke-linecap: round; }
html.js-motion .fx-wire[data-anim]:not(.is-in) .fx-wire__lit { stroke-dashoffset: var(--len, 1000); }
html.js-motion .fx-wire.is-in .fx-wire__lit { animation: wire 2.4s var(--e-in-out) forwards; }
@keyframes wire { from { stroke-dashoffset: var(--len, 1000); } to { stroke-dashoffset: 0; } }

/* ================================================================
   C16 Tabs
   ================================================================ */
.c-tabs__list { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: var(--sp-5); }
.c-tab {
  display: inline-flex; align-items: center; gap: 8px; min-height: 42px; padding: 0 14px;
  border-radius: var(--r-pill); border: 1px solid var(--line-1); background: var(--s2);
  font: 600 var(--fs-small) / 1 var(--font-display); color: var(--t2);
  transition: color var(--d-1) var(--e-out), background var(--d-1) var(--e-out), border-color var(--d-1) var(--e-out);
}
.c-tab:hover { color: var(--t1); border-color: var(--line-2); }
.c-tab[aria-selected="true"] { color: var(--t1); background: var(--s4); border-color: var(--blue-lift); }
.c-tab__num { font: 500 var(--fs-micro) / 1 var(--font-mono); color: var(--t4); }
.c-tab[aria-selected="true"] .c-tab__num { color: var(--t-accent); }
.c-tabs__panel[hidden] { display: none; }
html:not(.js) .c-tabs__panel[hidden] { display: block; margin-bottom: var(--sp-8); }
@media (max-width: 767px) { .c-tabs__list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); } .c-tab { justify-content: center; } }

/* ================================================================
   C17 前后对比
   ================================================================ */
.c-compare { position: relative; overflow: hidden; border-radius: var(--r-sm); aspect-ratio: 16 / 9; background: var(--s4); }
.c-compare img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.c-compare__after { clip-path: inset(0 0 0 var(--p, 50%)); }
.c-compare__range { position: absolute; inset: auto 0 0 0; width: 100%; height: 40px; opacity: 0; cursor: ew-resize; }
.c-compare__handle { position: absolute; top: 0; bottom: 0; left: var(--p, 50%); width: 2px; background: var(--t1); pointer-events: none; }
.c-compare__handle::after { content: ''; position: absolute; top: 50%; left: 50%; width: 36px; height: 36px; transform: translate(-50%, -50%); border-radius: 50%; background: var(--s4); border: 1px solid var(--line-ui); }
.c-compare:focus-within { outline: 2px solid var(--focus-color); outline-offset: 3px; }

/* ================================================================
   C18 步骤轴
   ================================================================ */
.c-steps { position: relative; display: grid; gap: var(--sp-6); padding-left: 34px; }
.c-steps::before { content: ''; position: absolute; left: 11px; top: 8px; bottom: 8px; width: 2px; background: var(--line-2); }
.c-steps__step { position: relative; display: grid; gap: 6px; }
.c-steps__dot { position: absolute; left: -34px; top: 3px; width: 24px; height: 24px; border-radius: 50%; background: var(--s2); border: 1.5px solid var(--blue-lift); transition: background var(--d-3) var(--e-out), border-color var(--d-3) var(--e-out); }
.c-steps__dot::after { content: ''; position: absolute; inset: 7px; border-radius: 50%; background: var(--blue-lift); transition: background var(--d-3) var(--e-out); }
.c-steps__step.is-in .c-steps__dot { border-color: var(--t-accent); }
.c-steps__step.is-in .c-steps__dot::after { background: var(--t-accent); }
.c-steps__title { font-size: var(--fs-h4); }
.c-steps__desc { font-size: var(--fs-small); color: var(--t2); }

/* ================================================================
   C19 轨道
   ================================================================ */
.c-orbit { position: relative; display: grid; place-items: center; aspect-ratio: 1; max-width: 420px; margin-inline: auto; }
.c-orbit__rings { position: absolute; inset: 6%; border-radius: 50%; border: 1px solid var(--line-1); }
.c-orbit__rings::before { content: ''; position: absolute; inset: 20%; border-radius: 50%; border: 1px dashed var(--line-1); }
.c-orbit__core { width: 34%; }
.c-orbit__node { position: absolute; inset: 0; display: flex; align-items: flex-start; justify-content: center; padding-top: 4%; transform: rotate(var(--a)); }
.c-orbit__chip { display: inline-block; padding: 6px 10px; border-radius: var(--r-pill); background: var(--s3); border: 1px solid var(--line-2); font: 600 var(--fs-micro) / 1.2 var(--font-display); color: var(--t1); white-space: nowrap; transform: rotate(calc(-1 * var(--a))); }
html.js-motion .c-orbit:not(.is-in) { transform: rotate(-20deg); opacity: 0; }
.c-orbit { transition: transform var(--d-5) var(--e-out), opacity var(--d-4) var(--e-out); }
@media (max-width: 767px) { .c-orbit { display: none; } }

/* ================================================================
   C22 页脚
   ================================================================ */
.c-footer { margin-top: var(--section-y); padding-block: var(--sp-8) var(--sp-6); background: var(--s1); border-top: 1px solid var(--line-1); }
.c-footer__inner { display: grid; gap: var(--sp-7) var(--sp-6); }
.c-footer__brand { display: grid; gap: 10px; align-content: start; }
.c-footer__tagline { font-size: var(--fs-small); color: var(--t3); max-width: 26ch; }
.c-footer__nav { display: flex; flex-wrap: wrap; gap: var(--sp-6); }
.c-footer__col { min-width: 132px; }
.c-footer__title { font: 600 var(--fs-small) / 1.4 var(--font-text); color: var(--t1); margin-bottom: 10px; }
.c-footer__list { display: grid; gap: 6px; }
.c-footer__list a { font-size: var(--fs-small); color: var(--t2); }
.c-footer__list a:hover { color: var(--t1); }
.c-footer__meta { display: grid; gap: 6px; align-content: start; font-size: var(--fs-micro); color: var(--t3); line-height: 1.7; }
.c-footer__bottom { display: flex; flex-wrap: wrap; gap: var(--sp-4); justify-content: space-between; align-items: center; margin-top: var(--sp-6); padding-top: var(--sp-4); border-top: 1px solid var(--line-1); font-size: var(--fs-micro); color: var(--t3); }
.c-footer details { font-size: var(--fs-micro); }
.c-footer summary { cursor: pointer; color: var(--t2); }
.c-footer summary:hover { color: var(--t1); }
.c-footer__credits { display: grid; gap: 4px; margin-top: 8px; max-width: 70ch; line-height: 1.6; }
.c-footer__credits a { color: var(--t3); text-decoration: underline; text-underline-offset: 2px; }
@media (min-width: 1024px) { .c-footer__inner { grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr) minmax(0, 1.2fr); } }
@media (min-width: 600px) and (max-width: 1023px) { .c-footer__inner { grid-template-columns: 1fr 1fr; } .c-footer__meta { grid-column: 1 / -1; } }

/* ================================================================
   通用区块
   ================================================================ */
.c-section { padding-block: var(--section-y); position: relative; }
.c-section--s0 { background: var(--s0); }
.c-section--s1 { background: var(--s1); }
.c-section__more { margin-top: var(--sp-6); display: flex; gap: var(--sp-5); flex-wrap: wrap; align-items: center; }
.c-note { font-size: var(--fs-micro); color: var(--t4); line-height: 1.7; max-width: 76ch; }
.c-divider { height: 1px; background: var(--line-1); border: 0; }
.c-factbar { display: flex; flex-wrap: wrap; gap: var(--sp-4) var(--sp-7); }
.c-fact { display: grid; gap: 2px; }
.c-fact b { font: 600 var(--fs-h3) / 1 var(--font-display); color: var(--t1); font-variant-numeric: tabular-nums; }
.c-fact span { font-size: var(--fs-micro); color: var(--t3); }

/* 点阵背景场 */
.fx-field { position: absolute; inset: 0; pointer-events: none; z-index: 0; overflow: hidden;
  background: radial-gradient(circle, rgba(201, 208, 236, .10) 1px, transparent 1.6px) 0 0 / 14px 14px;
  -webkit-mask-image: linear-gradient(90deg, transparent 0 34%, #000 78%); mask-image: linear-gradient(90deg, transparent 0 34%, #000 78%);
}
.fx-field::after { content: ''; position: absolute; inset: 0; background: var(--g-brand); opacity: .32;
  -webkit-mask: radial-gradient(circle, #000 1.2px, transparent 1.8px) 0 0 / 14px 14px; mask: radial-gradient(circle, #000 1.2px, transparent 1.8px) 0 0 / 14px 14px; }
.fx-field--left { -webkit-mask-image: linear-gradient(270deg, transparent 0 34%, #000 78%); mask-image: linear-gradient(270deg, transparent 0 34%, #000 78%); }
.c-section > .l-container, .c-section > .l-wide { position: relative; z-index: 1; }

/* 队形图形 */
.m-formation { width: 100%; height: auto; max-width: 100%; overflow: visible; }
html.js-motion .m-formation[data-anim] circle { opacity: 0; transform-box: fill-box; transform-origin: center; transform: scale(.4); }
html.js-motion .m-formation.is-in circle { animation: dotin 620ms var(--e-out) forwards; animation-delay: calc(var(--w, 0) * 55ms); }
@keyframes dotin { to { opacity: 1; transform: scale(1); } }
.m-formation circle { transition: fill 240ms var(--e-out), opacity 240ms var(--e-out); }

/* ================================================================
   收尾 CTA（首页、关于页、能力页共用）
   ================================================================ */
/* h-cta__* 是页面模板里的历史类名，与 c-cta__* 等价 */
.c-cta__grid, .h-cta__grid { display: grid; gap: var(--sp-7); align-items: center; }
.c-cta__copy, .h-cta__copy { display: grid; gap: var(--sp-4); }
.c-cta__title, .h-cta__title { font-size: var(--fs-h1); }
.c-cta__lead, .h-cta__lead { font-size: var(--fs-lead); color: var(--t2); max-width: 42ch; }
.c-cta__actions, .h-cta__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-5); }
.c-cta__figure, .h-cta__figure { display: grid; place-items: center; }
.c-cta__svg, .h-cta__svg { width: 100%; max-width: 420px; }
@media (min-width: 1024px) { .c-cta__grid, .h-cta__grid { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); } }
@media (max-width: 1023px) { .c-cta__figure, .h-cta__figure { order: -1; } .c-cta__svg, .h-cta__svg { max-width: 300px; } }

/* 容器钩子（Tabs / Tabs 组） */
.c-tabs { display: grid; gap: var(--sp-4); }
.c-footer__settings { display: flex; gap: var(--sp-3); align-items: center; }


/* ================================================================
   C2x 演示 —— AIGC 样例的可玩版本（小游戏 / 点一盏灯 / 视频分镜预览）
   无 JS：静态图位 + 说明文字；有 JS（.is-ready）：assets/js/demos/*.js 叠加交互层。手机框保持 9:19.5。
   ================================================================ */
.c-demo { display: grid; gap: 10px; min-width: 0; }
.c-demo [hidden] { display: none !important; }
.c-demo__caption { font-size: var(--fs-micro); color: var(--t3); text-align: center; line-height: 1.5; }
.c-demo__fine { font-size: var(--fs-micro); color: var(--t3); line-height: 1.45; }
.c-demo__eyebrow { font: 500 var(--fs-micro) / 1.3 var(--font-mono); color: var(--t-accent); letter-spacing: .04em; }
.c-demo__title { font: 700 var(--fs-h4) / 1.25 var(--font-display); color: var(--t1); }
.c-demo__text { font-size: var(--fs-micro); color: var(--t2); line-height: 1.55; }
.c-demo__big { font: 700 var(--fs-h1) / 1 var(--font-display); color: var(--t1); }
.c-demo .c-btn:disabled { opacity: .45; cursor: not-allowed; filter: none; transform: none; }

/* 叠层：铺满手机屏 */
.c-demo__canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.c-demo__layer {
  position: absolute; inset: 0; z-index: 2;
  display: grid; align-content: center; justify-items: center; gap: 10px;
  padding: 18px 16px; text-align: center;
}
.c-demo__layer--mid { background: color-mix(in srgb, var(--s0) 88%, transparent); }
.c-demo__layer--mid .c-btn { min-width: 132px; }

/* ---------- 接住光点 ---------- */
.c-demo--catch .c-demo__canvas { touch-action: auto; outline: none; }
.c-demo--catch.is-playing .c-demo__canvas { touch-action: none; user-select: none; -webkit-user-select: none; }
.c-demo--catch .c-demo__canvas:focus-visible { box-shadow: inset 0 0 0 2px var(--focus-color); }
.c-demo__layer--cover {
  align-content: end; gap: 8px; padding-bottom: 20px;
  background: linear-gradient(180deg, transparent 8%, color-mix(in srgb, var(--s0) 90%, transparent) 34%, var(--s0) 60%);
}
.c-demo__legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 10px; width: 100%; text-align: left; }
.c-demo__legend li { display: flex; align-items: center; gap: 6px; font-size: var(--fs-micro); color: var(--t2); min-width: 0; line-height: 1.3; }
.c-demo__shape { flex: none; width: 12px; height: 12px; border-radius: 50%; }
.c-demo__shape--0 { background: var(--indigo-lift); }
.c-demo__shape--1 { border: 3px solid var(--blue-lift); }
.c-demo__shape--2 { border: 2px solid var(--cyan-text); box-shadow: inset 0 0 0 2px var(--s0), inset 0 0 0 4px var(--cyan-text); }
.c-demo__shape--3 { border: 1px dashed var(--dot-ink-dim); background: var(--s0); }
.c-demo__check { display: inline-flex; align-items: center; gap: 8px; min-height: 32px; font-size: var(--fs-micro); color: var(--t2); cursor: pointer; }
.c-demo__check input { width: 16px; height: 16px; accent-color: var(--brand-cyan); }
.c-demo__go { min-width: 132px; }
.c-demo__icon {
  position: absolute; top: 8px; right: 8px; z-index: 3;
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: color-mix(in srgb, var(--s0) 60%, transparent); border: 1px solid var(--line-2);
}
.c-demo__icon:hover { border-color: var(--t-accent); }
.c-demo__bars { width: 3px; height: 11px; background: var(--t1); box-shadow: 6px 0 0 var(--t1); margin-left: -6px; }
.c-demo__stars { display: flex; gap: 8px; }
.c-demo__star {
  width: 26px; height: 26px; background: var(--line-2);
  clip-path: polygon(50% 0, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}
.c-demo__star.is-on { background: var(--t-accent); }
html.js-motion .c-demo__star.is-on { animation: c-demo-star var(--d-4) var(--e-out) backwards; }
html.js-motion .c-demo__star.is-on:nth-child(2) { animation-delay: 120ms; }
html.js-motion .c-demo__star.is-on:nth-child(3) { animation-delay: 240ms; }
@keyframes c-demo-star { from { transform: scale(.3); opacity: 0; } }

/* ---------- 点一盏灯 ---------- */
.c-demo__app { display: flex; flex-direction: column; }
.c-demo__ask { flex: 1 0 auto; display: grid; align-content: start; gap: 8px; padding: 12px; background: var(--s2); }
.c-demo__ask > p { font-size: var(--fs-micro); color: var(--t2); }
.c-demo__btn { display: inline-flex; justify-content: center; padding: 7px 10px; border-radius: var(--r-pill); background: var(--g-btn); color: var(--t1); font: 600 var(--fs-micro) / 1.2 var(--font-display); }
.c-demo__form { display: grid; gap: 7px; min-width: 0; }
.c-demo__label { font: 600 var(--fs-micro) / 1.4 var(--font-display); color: var(--t1); }
.c-demo__input {
  width: 100%; min-width: 0; height: 40px; padding: 0 12px;
  border-radius: var(--r-xs); border: 1px solid var(--line-2); background: var(--s3); color: var(--t1);
  font: 600 var(--fs-body) / 1 var(--font-display);
}
.c-demo__input::placeholder { color: var(--t4); font-weight: 400; }
.c-demo__input:focus-visible { outline: none; border-color: var(--focus-color); box-shadow: 0 0 0 1px var(--focus-color); }
.c-demo__swatches { display: flex; gap: 6px; border: 0; padding: 0; margin: 0; min-width: 0; }
.c-demo__swatch {
  position: relative; flex: 1; min-width: 0;
  display: inline-flex; align-items: center; justify-content: center; gap: 5px; height: 30px;
  border-radius: var(--r-pill); border: 1px solid var(--line-2); background: var(--s3);
  font-size: var(--fs-micro); color: var(--t2); cursor: pointer; white-space: nowrap;
}
.c-demo__swatch input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.c-demo__swatch:has(input:checked) { border-color: var(--t-accent); color: var(--t1); background: var(--s4); }
.c-demo__swatch:has(input:focus-visible) { outline: 2px solid var(--focus-color); outline-offset: 2px; }
.c-demo__dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.c-demo__swatch--0 .c-demo__dot { background: var(--indigo-lift); }
.c-demo__swatch--1 .c-demo__dot { background: var(--blue-lift); }
.c-demo__swatch--2 .c-demo__dot { background: var(--cyan-text); }
.c-demo__form .c-demo__go { width: 100%; }
.c-demo__hint { min-height: 1.45em; font-size: var(--fs-micro); line-height: 1.45; color: var(--t-indigo); text-align: center; }
.c-demo__layer--lantern {
  align-content: end; padding-bottom: 14px;
  background: radial-gradient(90% 55% at 50% 38%, var(--glow-indigo), transparent 70%), var(--s0);
}
.c-demo__style { position: absolute; top: 12px; left: 12px; color: var(--t3); }
.c-demo__word {
  position: absolute; z-index: 1; transform: translate(-50%, -50%);
  display: grid; justify-items: center; margin: 0;
  font-family: var(--font-display); font-weight: 700; line-height: 1.15; color: var(--t1);
  text-shadow: 0 0 12px var(--glow-cyan), 0 0 2px var(--s0);
  overflow-wrap: anywhere; text-align: center; white-space: nowrap;
  opacity: 0; transition: opacity var(--d-4) var(--e-out), transform var(--d-4) var(--e-out);
}
.c-demo__word span { display: block; }
html.js-motion .c-demo__word { transform: translate(-50%, -38%); }
.c-demo.is-lit .c-demo__word { opacity: 1; transform: translate(-50%, -50%); }
.c-demo__bar { position: relative; z-index: 1; display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 8px; }
.c-demo__text-btn { min-height: 32px; padding: 0 10px; font-size: var(--fs-micro); color: var(--t3); text-decoration: underline; text-underline-offset: 3px; flex-basis: 100%; }
.c-demo__text-btn:hover { color: var(--t1); }
.c-demo__layer--share { background: var(--s0); gap: 8px; padding: 14px 12px; }
.c-demo__card { width: min(100%, 190px); aspect-ratio: 3 / 4; height: auto; border-radius: var(--r-sm); box-shadow: var(--shadow-pop), 0 0 0 1px var(--line-2); }

/* ---------- 视频分镜预览 ---------- */
.c-demo--video > .c-slot { isolation: isolate; }
/* 封面缺图时占位说明落到下方，不被居中的播放按钮压住 */
.c-demo--video > .c-slot > .c-slot__ph { place-content: end center; padding-bottom: 8%; }
.c-demo--video > .c-slot > img { transition: transform var(--d-6) var(--e-out); }
html.js-motion:not(.loops-paused) .c-demo--video.is-playing > .c-slot > img { transform: scale(1.07); transition: transform 12s linear; }
.c-demo__play {
  position: absolute; z-index: 2; left: 50%; top: 50%; transform: translate(-50%, -50%);
  display: grid; place-items: center; width: 56px; height: 56px; border-radius: 50%;
  background: color-mix(in srgb, var(--s0) 55%, transparent); border: 1px solid var(--line-3);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--s0) 25%, transparent);
  transition: transform var(--d-3) var(--e-out), border-color var(--d-2) var(--e-out), width var(--d-3) var(--e-out), height var(--d-3) var(--e-out);
}
.c-demo__play:hover { border-color: var(--t-accent); }
.c-demo__tri { width: 0; height: 0; margin-left: 4px; border-style: solid; border-width: 9px 0 9px 15px; border-color: transparent transparent transparent var(--t1); }
.c-demo--video.is-started .c-demo__play { left: 12px; top: auto; bottom: 12px; transform: none; width: 40px; height: 40px; box-shadow: none; }
.c-demo--video.is-playing .c-demo__tri { width: 4px; height: 14px; margin-left: -6px; border: 0; background: var(--t1); box-shadow: 8px 0 0 var(--t1); }
.c-demo__shot {
  position: absolute; z-index: 2; top: 10px; left: 10px; max-width: calc(100% - 20px);
  padding: 4px 8px; border-radius: var(--r-xs); background: color-mix(in srgb, var(--s0) 70%, transparent);
  font-size: var(--fs-micro); color: var(--t2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.c-demo__sub {
  position: absolute; z-index: 2; left: 50%; bottom: 14%; transform: translateX(-50%);
  width: max-content; max-width: calc(100% - 120px);
  padding: 4px 10px; border-radius: var(--r-xs); background: color-mix(in srgb, var(--s0) 72%, transparent);
  font: 600 var(--fs-small) / 1.45 var(--font-display); color: var(--t1); text-align: center;
}
.c-demo__sub:empty { display: none; }
.c-demo__track { position: relative; }
.c-demo__timeline { display: flex; gap: 3px; height: 34px; }
.c-demo__timeline li {
  display: grid; place-items: center; min-width: 0; border-radius: var(--r-xs);
  background: var(--s3); border: 1px solid var(--line-1); font-size: var(--fs-micro); color: var(--t3);
  transition: background var(--d-2) var(--e-out), border-color var(--d-2) var(--e-out), color var(--d-2) var(--e-out);
}
.c-demo__timeline li:first-child { background: var(--s4); }
.c-demo__timeline li.is-past { background: color-mix(in srgb, var(--brand-blue) 22%, var(--s3)); color: var(--t2); }
.c-demo__timeline li.is-on { background: color-mix(in srgb, var(--brand-blue) 38%, var(--s4)); border-color: var(--blue-lift); color: var(--t1); }
.c-demo__playhead { position: absolute; top: -3px; bottom: -3px; left: 40%; width: 2px; margin-left: -1px; background: var(--t-accent); box-shadow: 0 0 8px var(--t-accent); }
.c-demo__tc { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: var(--fs-micro); color: var(--t3); }
.c-demo__note { font-family: var(--font-text); color: var(--t4); }
@media (max-width: 479px) {
  .c-demo__sub { max-width: calc(100% - 24px); bottom: 60px; font-size: var(--fs-micro); }
  .c-demo__play { width: 48px; height: 48px; }
}

/* ---------- 写作台（智能文本创作） ----------
   需求 → 成稿类型标签 → 输出面板（逐字生成 + 品牌词高亮 + 字数）。无 JS 时只有需求与主文案。 */
.c-write { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto 1fr auto; align-content: stretch; height: 100%; }
.c-write__k { font-size: var(--fs-micro); color: var(--t4); letter-spacing: .06em; }
.c-write__brief { display: grid; gap: 4px; padding: 10px 12px; border-radius: var(--r-xs); border: 1px dashed var(--line-2); }
.c-write__brief-text {
  font-size: var(--fs-micro); line-height: 1.55; color: var(--t2);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.c-write__tabs { display: flex; gap: 2px; padding: 3px; border-radius: var(--r-pill); background: var(--s3); border: 1px solid var(--line-1); }
.c-write__tab {
  flex: 1 1 auto; min-width: 0; min-height: 32px; padding: 6px 6px;  /* 按标签宽度分配，长标签（Headlines）不被截断 */ border: 0; border-radius: var(--r-pill);
  background: transparent; color: var(--t3); cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  font: 600 var(--fs-micro) / 1 var(--font-display);
  transition: background var(--d-2) var(--e-out), color var(--d-2) var(--e-out);
}
.c-write__tab:hover { color: var(--t1); }
.c-write__tab[aria-selected="true"] { background: var(--s4); color: var(--t1); box-shadow: inset 0 0 0 1px var(--line-2); }
.c-write__tab:focus-visible, .c-write__lang:focus-visible { outline: 2px solid var(--focus-color); outline-offset: 1px; }

.c-write__out {
  display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto 1fr auto; gap: 10px; min-width: 0; min-height: 248px; padding: 12px 14px;
  border-radius: var(--r-sm); background: var(--s1); border: 1px solid var(--line-2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04);
}
.c-write__bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-bottom: 8px; border-bottom: 1px solid var(--line-1); }
.c-write__meta { min-width: 0; font-size: var(--fs-micro); color: var(--t4); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.c-write__status { display: inline-flex; align-items: center; gap: 6px; flex: none; font-size: var(--fs-micro); color: var(--t3); }
.c-write__status::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--line-ui); }
.c-write__status[data-state="writing"] { color: var(--t-accent); }
.c-write__status[data-state="writing"]::before { background: var(--t-accent); box-shadow: 0 0 8px var(--t-accent); animation: c-write-pulse 1s var(--e-in-out) infinite; }
.c-write__status[data-state="done"]::before { background: var(--t-accent); }

.c-write__doc { min-width: 0; font-size: var(--fs-small); line-height: 1.75; color: var(--t1); overflow-wrap: anywhere; }
.c-write__doc.is-writing { cursor: pointer; }
.c-write__doc mark { color: var(--t-accent); background: transparent; font-weight: 600; }
.c-write__cue { display: block; margin-bottom: 4px; font: 500 var(--fs-micro) / 1.5 var(--font-mono); color: var(--t4); }
/* 光标：只在生成中闪烁，挂在最后一个文本块后 */
.c-write__doc.is-writing .c-write__p::after,
.c-write__doc.is-writing .is-on .c-write__line::after {
  content: ''; display: inline-block; width: 2px; height: 1.1em; margin-left: 2px; vertical-align: -.15em;
  background: var(--t-accent); animation: c-write-caret .9s steps(1) infinite;
}
.c-write__heads { display: grid; gap: 6px; }
.c-write__heads li { display: grid; gap: 3px; padding: 8px 10px; border-radius: var(--r-xs); border: 1px solid transparent; color: var(--t3); transition: border-color var(--d-2) var(--e-out), background var(--d-2) var(--e-out); }
.c-write__heads li.is-on { background: var(--s3); border-color: var(--blue-lift); color: var(--t1); }
.c-write__heads .c-write__line { font: 600 var(--fs-small) / 1.45 var(--font-display); }
.c-write__tone-k { font-size: var(--fs-micro); color: var(--t4); }

.c-write__foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding-top: 8px; border-top: 1px solid var(--line-1); }
.c-write__langs { display: inline-flex; padding: 2px; border-radius: var(--r-pill); border: 1px solid var(--line-2); }
.c-write__lang { min-height: 26px; padding: 0 10px; border: 0; border-radius: var(--r-pill); background: transparent; color: var(--t3); cursor: pointer; font: 600 var(--fs-micro) / 1 var(--font-display); }
.c-write__lang[aria-pressed="true"] { background: var(--s4); color: var(--t1); }
.c-write__count { font-size: var(--fs-micro); color: var(--t3); }
.c-write__count.is-ok { color: var(--t-accent); }
.c-write__count.is-over { color: var(--t-indigo); }
.c-write__tone { margin-left: auto; }
.c-write__note { text-align: left; }
@keyframes c-write-caret { 50% { opacity: 0; } }
@keyframes c-write-pulse { 50% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) {
  .c-write__status[data-state="writing"]::before, .c-write__doc.is-writing .c-write__p::after, .c-write__doc.is-writing .is-on .c-write__line::after { animation: none; }
}

/* ---------- 点一盏灯 · 多平台演示 ----------
   平台切换（H5 / 小程序 / App）→ 手机外壳（data-platform 只显示一种）→ 同一套三屏流程 → 步骤条。
   外壳总高固定 44px（状态栏 16 + 导航 28），三种平台一样高：切平台时下面的流程不跳版。无 JS 时平台切换隐藏，外壳与步骤列表静态显示。 */
.c-lamp { justify-items: center; }
.c-lamp > * { width: min(100%, 250px); }
.c-lamp > .c-demo__caption { width: auto; }

/* 平台切换：与手机同宽的分段控件 */
.c-lamp__plats { display: flex; gap: 2px; padding: 3px; border-radius: var(--r-pill); background: var(--s3); border: 1px solid var(--line-1); }
.c-lamp__plat {
  flex: 1 1 auto; min-width: 0; min-height: 30px; padding: 0 8px; border: 0; border-radius: var(--r-pill);
  background: transparent; color: var(--t3); cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  font: 600 var(--fs-micro) / 1 var(--font-display);
  transition: background var(--d-2) var(--e-out), color var(--d-2) var(--e-out);
}
.c-lamp__plat:hover { color: var(--t1); }
.c-lamp__plat[aria-pressed="true"] { background: var(--s4); color: var(--t1); box-shadow: inset 0 0 0 1px var(--line-2); }
.c-lamp__plat:focus-visible { outline: 2px solid var(--focus-color); outline-offset: 1px; }

/* 外壳：状态栏 + 平台导航条 */
.c-lamp__chrome { flex: none; position: relative; z-index: 3; background: var(--s1); color: var(--t2); }
.c-lamp__status { display: flex; align-items: center; gap: 4px; height: 16px; padding: 3px 18px 0 20px; font-size: calc(var(--fs-micro) * .78); font-weight: 600; color: var(--t1); }
.c-lamp__status .u-mono { margin-right: auto; }
.c-lamp__sig { width: 11px; height: 7px; background: linear-gradient(90deg, currentColor 0 2px, transparent 2px 3px, currentColor 3px 5px, transparent 5px 6px, currentColor 6px 8px, transparent 8px 9px, currentColor 9px); clip-path: polygon(0 100%, 100% 0, 100% 100%); }
.c-lamp__bat { position: relative; width: 14px; height: 7px; border: 1px solid currentColor; border-radius: 2px; }
.c-lamp__bat::before { content: ''; position: absolute; inset: 1px 4px 1px 1px; border-radius: 1px; background: currentColor; }
.c-lamp__bat::after { content: ''; position: absolute; right: -3px; top: 1.5px; width: 1.5px; height: 2.5px; border-radius: 0 1px 1px 0; background: currentColor; }
.c-lamp__nav { position: relative; display: none; align-items: center; height: 28px; padding: 0 10px; border-bottom: 1px solid var(--line-1); }
.c-lamp[data-platform="h5"] .c-lamp__nav--h5,
.c-lamp[data-platform="mini"] .c-lamp__nav--mini,
.c-lamp[data-platform="app"] .c-lamp__nav--app { display: flex; }
.c-lamp__title { position: absolute; left: 50%; transform: translateX(-50%); max-width: calc(100% - 140px); font: 600 var(--fs-micro) / 1 var(--font-display); color: var(--t1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
/* H5：浏览器地址栏（中性文字，不写域名） */
.c-lamp__url {
  flex: 1; min-width: 0; height: 20px; display: flex; align-items: center; justify-content: center; gap: 5px; padding: 0 10px;
  border-radius: var(--r-pill); background: var(--s3); color: var(--t3);
  font-size: calc(var(--fs-micro) * .86); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.c-lamp__url::before { content: ''; flex: none; width: 6px; height: 6px; border-radius: 50%; border: 1px solid var(--t4); }
/* 小程序：居中标题 + 右侧胶囊（··· | ◯） */
.c-lamp__capsule { display: flex; align-items: center; margin-left: auto; height: 20px; border-radius: var(--r-pill); border: 1px solid var(--line-2); background: var(--s3); }
.c-lamp__capsule i { position: relative; display: grid; place-items: center; width: 24px; height: 100%; }
.c-lamp__more::before { content: ''; width: 3px; height: 3px; border-radius: 50%; background: var(--t2); box-shadow: -5px 0 0 var(--t2), 5px 0 0 var(--t2); }
.c-lamp__ring { border-left: 1px solid var(--line-2); }
.c-lamp__ring::before { content: ''; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--t2); box-shadow: inset 0 0 0 1.5px var(--s3), inset 0 0 0 3px var(--t2); }
/* App：返回箭头 + 居中标题，导航条与内容同底色 */
.c-lamp[data-platform="app"] .c-lamp__chrome { background: var(--s0); }
.c-lamp__chev { width: 8px; height: 8px; margin-left: 4px; border-left: 2px solid var(--t1); border-bottom: 2px solid var(--t1); transform: rotate(45deg); }

/* 外壳下面的内容区：插图在剩余高度里收缩（cover 裁边），表单保持自然高度 */
.c-lamp__view { position: relative; flex: 1; min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.c-lamp__view > .c-slot { position: relative; inset: auto; flex: 0 1 auto; min-height: 72px; height: auto; border-radius: 0; }
/* 外壳占了 44px，表单收紧一点，把高度留给插图 */
.c-lamp .c-demo__ask { padding: 10px 12px; }
.c-lamp .c-demo__form { gap: 6px; }
.c-lamp .c-demo__input { height: 36px; }
.c-lamp .c-demo__swatch { height: 28px; }
.c-lamp .c-demo__label, .c-lamp .c-demo__fine { line-height: 1.35; }

/* 推荐词：固定一行，四枚按字宽分配 */
.c-lamp__chips { display: flex; gap: 4px; min-width: 0; }
.c-lamp__chip {
  flex: 1 1 auto; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  min-height: 24px; padding: 0 6px; border-radius: var(--r-pill); border: 1px dashed var(--line-2); background: transparent;
  font: 500 var(--fs-micro) / 1 var(--font-text); color: var(--t2); cursor: pointer;
  transition: border-color var(--d-1) var(--e-out), color var(--d-1) var(--e-out), background var(--d-1) var(--e-out);
}
.c-lamp__chip:hover { color: var(--t1); border-color: var(--line-ui); }
.c-lamp__chip[aria-pressed="true"] { border-style: solid; border-color: var(--t-accent); color: var(--t1); background: var(--s4); }
.c-lamp__chip:focus-visible { outline: 2px solid var(--focus-color); outline-offset: 1px; }
.c-demo__input[aria-invalid="true"] { border-color: var(--t-indigo); }
.c-demo__hint.is-bad { color: var(--t-indigo); font-weight: 600; }

/* 步骤条：01 → 02 → 03，圆点之间连线；当前步高亮，已完成的打勾（序号文字仍在，读屏可读）并可点回去 */
.c-lamp__flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.c-lamp__step { position: relative; min-width: 0; }
.c-lamp__step + .c-lamp__step::before { content: ''; position: absolute; top: 11px; left: calc(-50% + 15px); right: calc(50% + 15px); height: 1px; background: var(--line-2); transition: background var(--d-3) var(--e-out); }
.c-lamp__step.is-on::before, .c-lamp__step.is-done::before { background: var(--blue-lift); }
.c-lamp__cell {
  display: grid; justify-items: center; gap: 5px; width: 100%; padding: 0 2px 2px; border: 0; border-radius: var(--r-xs);
  background: transparent; color: inherit; text-align: center; font: inherit;
}
button.c-lamp__cell:not(:disabled) { cursor: pointer; }
button.c-lamp__cell:disabled { cursor: default; }
.c-lamp__cell:focus-visible { outline: 2px solid var(--focus-color); outline-offset: 2px; }
.c-lamp__no {
  position: relative; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  border: 1px solid var(--line-2); background: var(--s2); color: var(--t4); font-size: calc(var(--fs-micro) * .86);
  transition: background var(--d-2) var(--e-out), border-color var(--d-2) var(--e-out), color var(--d-2) var(--e-out), box-shadow var(--d-2) var(--e-out);
}
.c-lamp__name { font-size: var(--fs-micro); line-height: 1.3; color: var(--t4); transition: color var(--d-2) var(--e-out); }
.c-lamp__step.is-on .c-lamp__no { border-color: var(--t-accent); color: var(--t1); background: var(--s4); box-shadow: 0 0 0 3px var(--glow-cyan); }
.c-lamp__step.is-on .c-lamp__name { color: var(--t1); font-weight: 600; }
.c-lamp__step.is-done .c-lamp__no { border-color: var(--blue-lift); background: color-mix(in srgb, var(--brand-blue) 40%, var(--s3)); color: transparent; }
.c-lamp__step.is-done .c-lamp__no::after { content: ''; position: absolute; width: 8px; height: 4px; margin-top: -2px; border-left: 1.5px solid var(--t1); border-bottom: 1.5px solid var(--t1); transform: rotate(-45deg); }
.c-lamp__step.is-done .c-lamp__name { color: var(--t2); }
.c-lamp__step.is-done button.c-lamp__cell:hover .c-lamp__name { color: var(--t1); text-decoration: underline; text-underline-offset: 3px; }
/* 光点聚拢中：当前步的圆点轻轻呼吸 */
html.js-motion .c-lamp[data-step="lit"]:not(.is-lit) .c-lamp__step.is-on .c-lamp__no { animation: c-write-pulse 1s var(--e-in-out) infinite; }
@media (prefers-reduced-motion: reduce) { .c-lamp .c-lamp__no { animation: none !important; } }