:root {
  --ink: #171a20;
  --muted: #606775;
  --subtle: #6c7381;
  --blue: #235ee8;
  --blue-deep: #1848bc;
  --line: #e4e7ec;
  --paper: #fff;
  --wash: #f6f8fc;
  --nav-h: 80px;
  --gutter: clamp(24px, 6.6vw, 128px);
  --ease: cubic-bezier(.22, 1, .36, 1);
  --font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scrollbar-gutter: stable; }
body { background: var(--paper); color: var(--ink); font-family: var(--font); line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: clip; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; border: 0; background: none; color: inherit; }
img, video { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
[id] { scroll-margin-top: 112px; }
::selection { background: #d5e3ff; color: #123779; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 5px; }
.container, .nav__inner { width: min(1520px, calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 500; left: 12px; top: 12px; background: var(--blue); color: #fff; padding: 12px 24px; transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.scroll-progress { position: fixed; z-index: 250; top: 0; left: 0; width: 100%; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; }

.nav { position: fixed; top: 0; inset-inline: 0; height: var(--nav-h); z-index: 100; background: #ffffffec; border-bottom: 1px solid transparent; backdrop-filter: blur(18px); transition: border-color .3s; }
.nav.is-scrolled { border-color: #e8ebf180; }
.nav__inner { height: 100%; display: flex; align-items: center; gap: 38px; }
.nav__logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-text { font-size: 26px; letter-spacing: -.06em; font-weight: 600; }
.logo-mark { display: flex; gap: 3px; align-items: center; height: 23px; }
.logo-mark i { background: var(--blue); width: 3px; border-radius: 2px; }
.logo-mark i:nth-child(1) { height: 9px; }
.logo-mark i:nth-child(2) { height: 21px; }
.logo-mark i:nth-child(3) { height: 15px; }
.logo-mark i:nth-child(4) { height: 8px; }
.nav__links { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.nav__links > a, .nav__dropbtn { font-size: 14px; color: #4c515c; min-height: 42px; display: flex; align-items: center; white-space: nowrap; transition: color .2s; }
.nav__links > a:hover, .nav__links a.is-active, .nav__dropbtn.is-active, .nav__dropbtn:hover { color: var(--blue); }
.nav__actions { display: flex; align-items: center; gap: 14px; }
.nav__toggle { display: none; width: 40px; height: 42px; position: relative; }
.nav__toggle span { position: absolute; height: 1.5px; width: 22px; left: 9px; background: var(--ink); transition: transform .3s var(--ease); }
.nav__toggle span:first-child { top: 16px; }
.nav__toggle span:last-child { top: 24px; }
.nav.is-open .nav__toggle span:first-child { transform: translateY(4px) rotate(45deg); }
.nav.is-open .nav__toggle span:last-child { transform: translateY(-4px) rotate(-45deg); }
.nav__item { position: relative; }
.nav__dropbtn { gap: 7px; }
.caret { width: 6px; height: 6px; border-right: 1px solid; border-bottom: 1px solid; transform: rotate(45deg) translateY(-2px); transition: transform .3s; }
.nav__item.is-open .caret { transform: rotate(225deg) translateY(-2px); }
/* 右对齐展开：以按钮左偏 50px 会顶出视口右边（实测第三列跑出屏幕点不到），
   改为以导航项右边缘为准向左展开；max-width 兜住更窄的视口。 */
.dropdown { position: absolute; top: 100%; right: -16px; left: auto; display: grid; grid-template-columns: repeat(3, minmax(170px, 1fr)); gap: 32px; width: 680px; max-width: calc(100vw - 32px); background: #fff; padding: 32px; border: 1px solid #edf0f5; border-radius: 16px; box-shadow: 0 16px 50px #1a315510; opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .25s, transform .3s var(--ease); }
.nav__item.is-open .dropdown { opacity: 1; visibility: visible; transform: none; }
.dropdown__col { display: flex; flex-direction: column; gap: 5px; }
.dropdown h5 { font-size: 12px; font-weight: 400; color: var(--subtle); margin-bottom: 14px; }
.dropdown a { display: flex; flex-direction: column; padding: 10px 8px; border-radius: 8px; transition: background .2s; }
.dropdown a:hover { background: var(--wash); }
.dropdown b { font-size: 15px; font-weight: 500; }
.dropdown span { font-size: 12px; color: var(--muted); }
.dropdown .dropdown__all { font-size: 12px; color: var(--blue); margin-top: 10px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 22px; min-height: 44px; padding: 10px 24px; border-radius: 100px; font-size: 14px; line-height: 1.4; border: 1px solid transparent; transition: background .25s, color .25s, border-color .25s, transform .35s var(--ease); }
.btn--primary { background: var(--blue); color: #fff; }
.btn--primary:hover { background: var(--blue-deep); transform: translateY(-2px); }
.btn--line { background: #ffffff50; border-color: #b4c7ea; color: #204478; }
.btn--line:hover { background: #fff; border-color: var(--blue); }
.btn--ghost { background: #f0f3f9; color: #1e3970; }
.btn--ghost:hover { background: #e3ebfd; }
.btn--sm { min-height: 36px; padding: 8px 19px; font-size: 13px; }
.btn--block { width: 100%; }
.btn__arrow { transition: transform .3s; }
.btn:hover .btn__arrow { transform: translate(3px, -3px); }

.hero { padding-top: calc(var(--nav-h) + 54px); }
.hero__heading { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 30px; }
.hero__title { font-size: clamp(32px, 3vw, 46px); line-height: 1.4; letter-spacing: -.035em; font-weight: 400; }
.hero__heading > p { color: var(--muted); font-size: 14px; padding-bottom: 6px; }
.feature-stage { position: relative; width: 100%; min-width: 0; min-height: 550px; aspect-ratio: 2.25; border-radius: 24px; isolation: isolate; overflow: hidden; background: linear-gradient(118deg, #eff5ff 0%, #e8f0fe 40%, #daeaff 100%); }
.feature-stage:focus-visible { outline-offset: 6px; }
.feature-visual { position: absolute; inset: 0; z-index: -1; overflow: hidden; }
.feature-visual canvas { display: block; position: absolute; width: 100%; height: 100%; }
.feature-visual__light { position: absolute; inset: 0; background: radial-gradient(ellipse at 35% 20%, #fff 0%, transparent 45%), radial-gradient(ellipse at 90% 75%, #a8cbff50 0%, transparent 60%); }
.feature-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, #e8f1fff0 0, #e8f1ff70 23%, transparent 50%); pointer-events: none; }
.feature-category { position: absolute; left: 44px; top: 34px; font-size: 13px; color: #57709c; letter-spacing: .02em; }
.feature-greeting { position: absolute; top: 27%; right: 10%; color: #3c6dbb; font-size: clamp(24px, 3.1vw, 50px); letter-spacing: -.045em; font-weight: 300; line-height: 1.3; text-align: right; transform: translateY(0); transition: opacity .5s, transform .7s var(--ease); }
.feature-greeting span { display: block; }
.feature-greeting span:last-child { color: #3e70b38f; font-size: .8em; margin-top: 14px; }
/* 摘要已移到画面里的两行文字（#featureLine1 / #featureLine2），所有产品都显示 */
.feature-bottom { position: relative; display: flex; align-items: end; justify-content: space-between; gap: 40px; width: 100%; min-width: 0; min-height: inherit; aspect-ratio: inherit; padding: 210px 44px 42px; pointer-events: none; }
.feature-copy { min-width: 0; max-width: 75%; pointer-events: auto; }
.feature-kind { font-size: 16px; color: #41618f; margin-bottom: 8px; }
.feature-copy h2 { font-size: clamp(60px, 6.7vw, 108px); font-weight: 500; letter-spacing: -.07em; line-height: 1.12; overflow-wrap: anywhere; }
.feature-summary { color: #485e7e; font-size: 16px; margin-top: 18px; }
.feature-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; padding-bottom: 4px; pointer-events: auto; }

/* ---------- 第一屏 reel3 版 ----------
   整体平移视觉面板的场景结构，与面板同构：标题区（小标题 / 产品名 / 两行概念）在上、
   画板（画布 + 各产品文字层）居中、底栏（定位语 + 状态）在下，全部正常文档流。
   原版 slide 的类别、产品名、按钮整组移除——reel3 里不保留任何原版设计元素。
   版面高度：桌面由 .feature-stage 的 aspect-ratio / min-height 决定，
   手机由 .feature-stage 的 min-height 决定，所以原版那块可以放心 display:none。 */
.reel3 .feature-category, .reel3 .feature-bottom, .reel3 .feature-greeting { display: none; }
.r3-scene { position: absolute; inset: 0; z-index: 1; display: flex; flex-direction: column; padding: 30px 44px 22px; }
.r3-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 35px; }
.r3-kicker { color: #41618f; font-size: 11px; letter-spacing: .065em; margin-bottom: 10px; }
.r3-name { font-size: clamp(29px, 3.4vw, 46px); letter-spacing: -.06em; line-height: 1.25; font-weight: 450; }
.r3-dot { color: var(--blue); }
.r3-concept { font-size: 14px; line-height: 1.8; color: #41618f; text-align: right; }
.r3-board { position: relative; flex: 1; min-height: 0; }
.r3-footer { display: flex; align-items: center; justify-content: space-between; gap: 25px; border-top: 1px solid #dbe5f3; padding-top: 14px; }
.r3-tagline { font-size: 16px; line-height: 1.8; color: #204571; }
.r3-status { display: flex; align-items: center; gap: 8px; font-size: 11px; white-space: nowrap; color: #41618f; }
.r3-status i { height: 5px; width: 5px; border-radius: 50%; background: #4382d9; }
.r3-micro { display: block; font-size: 10px; letter-spacing: .1em; color: #41618f; line-height: 1.6; }
.r3-sample { font-size: 20px; line-height: 1.6; font-weight: 400; letter-spacing: -.035em; }
.r3-language { position: absolute; width: 33%; }
.r3-language .r3-micro { margin-bottom: 8px; }
.r3-language--source { left: 8%; top: 10%; }
.r3-language--target { left: 61%; bottom: 13%; width: 35%; }
.r3-language--target .r3-sample { color: #204571; font-size: 22px; line-height: 1.45; }
.r3-visual-caption { position: absolute; bottom: 9%; left: 8%; font-size: 11px; color: #485e7e; letter-spacing: .06em; }
.r3-label { position: absolute; top: 10%; }
.r3-label--source { left: 9%; }
.r3-label--target { right: 9%; text-align: right; }
.r3-label p { font-size: 14px; margin-top: 7px; color: #41618f; }
.r3-asr-source { position: absolute; top: 8%; left: 8%; }
.r3-asr-source p { font-size: 14px; color: #41618f; margin-top: 8px; }
.r3-transcription { position: absolute; left: 61%; width: 31%; top: 29%; }
.r3-transcription .r3-micro { margin-bottom: 19px; }
.r3-transcription .r3-sample { min-height: 3.2em; color: #204571; }
.r3-live-dot { display: inline-block; width: 4px; height: 4px; border-radius: 50%; background: var(--blue); margin: 0 5px 2px 0; }
.r3-caret { display: inline-block; width: 1px; height: 1em; background: #2c70df; margin-left: 5px; vertical-align: -.12em; animation: r3Caret 1.4s step-end infinite; }
@keyframes r3Caret { 50% { opacity: 0; } }
.r3-lines { margin-top: 20px; display: grid; gap: 10px; }
.r3-lines i { height: 2px; background: #bfd0e7; width: 72%; border-radius: 2px; }
.r3-lines i:nth-child(2) { width: 90%; opacity: .65; }
.r3-lines i:nth-child(3) { width: 54%; opacity: .4; }
.r3-utterance { position: absolute; width: 28%; top: 17%; left: 4%; }
.r3-utterance .r3-sample { font-size: 16px; color: #41618f; margin-top: 10px; }
.r3-actions { position: absolute; display: flex; flex-direction: column; justify-content: space-between; right: 5%; top: 15%; bottom: 22%; width: 15%; }
.r3-actions > span { display: flex; align-items: center; gap: 15px; font-size: 14px; color: #41618f; transition: color .25s; }
.r3-actions i { font-style: normal; font-size: 20px; height: 46px; width: 46px; display: grid; place-items: center; border: 1px solid #cbd9ed; border-radius: 50%; background: #ffffff7a; transition: background .25s, border-color .25s; }
.r3-actions > span.is-lit { color: #235ee8; }
.r3-actions > span.is-lit i { border-color: #235ee8; background: #e1ecff; }
.r3-phases { display: flex; align-items: center; justify-content: center; gap: 13px; position: absolute; left: 32%; width: 36%; bottom: 8%; font-size: 12px; color: #606775; }
.r3-phases i { width: 16px; height: 1px; background: #cbd9ed; }
.r3-phases span.is-lit { color: var(--blue); }
.r3-legend { display: flex; justify-content: center; gap: 24px; position: absolute; bottom: 4%; left: 0; right: 0; }
.r3-legend > span { display: flex; align-items: center; gap: 8px; font-size: 11px; color: #41618f; }
.r3-key { width: 18px; border-top: 1.5px solid #2c70df; }
.r3-key--reflected { border-top-style: dashed; opacity: .6; }
.r3-key--diffuse { border-top-style: dotted; opacity: .45; }
.r3-caption { position: absolute; left: 5%; top: 6%; color: #41618f; font-size: 12px; }
.r3-identity-labels { display: flex; position: absolute; left: 12%; right: 12%; top: 5%; justify-content: space-around; color: #41618f; font-size: 12px; letter-spacing: .1em; }
.r3-identity-result { position: absolute; left: 0; right: 0; bottom: 5%; text-align: center; color: #27549a; font-size: 13px; }
/* 手机端（与面板同一个 620px 断点）：文字缩一档、改排布，避免挤成一团 */
@media (max-width: 760px) {
  .r3-scene { padding: 20px 26px 14px; }
  .r3-heading { gap: 18px; }
  .r3-name { font-size: clamp(22px, 5.4vw, 30px); }
  .r3-kicker { font-size: 10px; margin-bottom: 6px; }
  .r3-concept { font-size: 12px; }
  .r3-footer { gap: 14px; padding-top: 10px; }
  .r3-tagline { font-size: 13px; }
  .r3-language { width: 86%; left: 7%; }
  .r3-language--source { top: 7%; }
  .r3-language--target { bottom: 8%; left: 22%; width: 72%; }
  .r3-language--target .r3-sample { font-size: 18px; }
  .r3-language .r3-micro { margin-bottom: 3px; }
  .r3-visual-caption { display: none; }
  .r3-label { top: 5%; }
  .r3-label--source { left: 7%; }
  .r3-label--target { right: 7%; }
  .r3-label p { font-size: 11px; margin-top: 4px; }
  .r3-label .r3-micro { font-size: 9px; }
  .r3-asr-source { left: 7%; }
  .r3-asr-source p { font-size: 12px; }
  .r3-transcription { left: 16%; width: 70%; top: 60%; }
  .r3-transcription .r3-micro { margin-bottom: 8px; font-size: 9px; }
  .r3-transcription .r3-sample { font-size: 17px; min-height: 3.2em; }
  .r3-lines { display: none; }
  .r3-utterance { top: 4%; width: 90%; left: 6%; }
  .r3-utterance .r3-sample { font-size: 15px; margin-top: 3px; }
  .r3-actions { top: auto; bottom: 11%; left: 8%; right: 8%; width: auto; flex-direction: row; }
  .r3-actions > span { flex-direction: column; gap: 5px; font-size: 11px; }
  .r3-actions i { width: 36px; height: 36px; font-size: 17px; }
  .r3-phases { bottom: 2%; left: 10%; width: 80%; gap: 10px; font-size: 10px; }
  .r3-caption { top: 8%; left: 6%; font-size: 11px; }
  .r3-legend { bottom: 9%; gap: 18px; }
  .r3-legend > span { font-size: 10px; }
  .r3-identity-labels { left: 0; right: 0; top: 12%; font-size: 11px; }
  .r3-identity-result { bottom: 12%; font-size: 12px; }
}
.feature-nav { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-top: 16px; }
.feature-tabs { display: flex; gap: 25px; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.feature-tabs::-webkit-scrollbar { display: none; }
.feature-tabs button { flex: 0 0 auto; position: relative; font-size: 14px; color: #767d88; padding: 12px 0 15px; }
.feature-tabs button::after { content: ""; position: absolute; bottom: 4px; left: 0; width: 100%; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease); }
.feature-tabs button[aria-selected="true"] { color: #204ca3; }
.feature-tabs button[aria-selected="true"]::after { transform: scaleX(1); }
.feature-controls { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.feature-step { border: 1px solid var(--line); border-radius: 50%; width: 36px; height: 36px; color: #4b5668; transition: background .2s; }
.feature-step:hover { background: #edf3ff; }
.motion-toggle { display: inline-flex; align-items: center; gap: 7px; color: #6b7586; padding: 12px; font-size: 11px; }
.motion-toggle__icon { width: 7px; height: 9px; border-inline: 2px solid; }
.motion-toggle[aria-pressed="true"] .motion-toggle__icon { height: 0; border: 5px solid transparent; border-left: 7px solid currentColor; border-right: 0; }
.motion-toggle:disabled { cursor: default; }

.section { padding: 105px 0; }
.sec-index, .p-card__no, .ov-card__no, .media-label, .cat-head__tag { display: none; }
.sec-title { font-size: clamp(32px, 3.05vw, 48px); font-weight: 400; line-height: 1.45; letter-spacing: -.035em; }
.sec-desc { font-size: 16px; line-height: 1.9; color: var(--muted); }
.sec-title small { display: inline; font: inherit; }
.sec-title small::after { content: " · "; }
.sec-head { display: flex; align-items: start; justify-content: space-between; gap: 80px; margin-bottom: 48px; }
.sec-head .sec-title { flex: 1; }
.sec-head .sec-desc { flex: 1; max-width: 560px; padding-top: 7px; }
.section--overview { padding: 110px 0 65px; }
.section--overview .sec-head { display: block; max-width: 750px; margin-bottom: 48px; }
.section--overview .sec-desc { margin-top: 20px; max-width: 690px; padding: 0; }
.overview-grid { display: flex; gap: 54px; align-items: start; }
.ov-card { flex: 1; position: relative; border-bottom: 1px solid var(--line); padding: 0 30px 26px 0; }
.ov-card h3 { font-size: 21px; font-weight: 400; transition: color .25s; }
.ov-card:hover h3 { color: var(--blue); }
.ov-card p { display: none; }
.ov-card__items { margin-top: 9px; font-size: 14px; color: var(--muted); }
.ov-card__arrow { position: absolute; right: 2px; top: 3px; color: #8d9bb5; font-size: 23px; transition: transform .3s, color .3s; }
.ov-card:hover .ov-card__arrow { color: var(--blue); transform: translateX(5px); }

.section--cat { padding: 80px 0 64px; }
.cat-head { margin-bottom: 65px; }
.cat-head > div:first-child { display: flex; align-items: start; justify-content: space-between; gap: 80px; }
.cat-head .sec-title { flex-shrink: 0; }
.cat-head .sec-desc { max-width: 580px; padding-top: 9px; }
.product-grid { display: flex; flex-direction: column; gap: 100px; }
.p-card { display: grid; grid-template-columns: .8fr 1.2fr; column-gap: 8%; align-items: center; min-width: 0; }
.p-card__media { grid-column: 2; grid-row: 1; min-width: 0; position: relative; aspect-ratio: 1.5; border-radius: 16px; overflow: hidden; isolation: isolate; background: #eff5ff; }
.p-card__body { grid-column: 1; grid-row: 1; min-width: 0; padding: 24px 0; }
.p-card:nth-child(even) { grid-template-columns: 1.2fr .8fr; }
.p-card:nth-child(even) .p-card__media { grid-column: 1; }
.p-card:nth-child(even) .p-card__body { grid-column: 2; }
.p-card__body h3 { font-size: clamp(32px, 2.8vw, 44px); font-weight: 500; letter-spacing: -.055em; line-height: 1.2; overflow-wrap: anywhere; }
.p-card__body h3 .product-brand { display: block; font-size: 14px; letter-spacing: 0; font-weight: 400; color: var(--subtle); margin-bottom: 12px; }
.p-card__tagline { font-size: 22px; font-weight: 400; line-height: 1.6; margin-top: 22px; }
.p-card__desc { font-size: 16px; color: var(--muted); line-height: 1.95; margin-top: 21px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px 18px; list-style: none; margin-top: 28px; }
.tag-list li { font-size: 13px; color: #5a7091; display: flex; align-items: center; gap: 7px; }
.tag-list li::before { content: ""; width: 3px; height: 3px; background: #7ca1df; border-radius: 50%; }

/* ---------- 产品切换 ----------
   脚本未加载时 .p-panel 保持纵向排列，六个产品全部可读；
   脚本就绪后容器加 .is-tabbed，一次只显示选中的那一个。 */
/* 方向轮转：脚本就绪后中间是当前方向，两侧露出相邻方向的一部分，
   点击侧边的会把那个方向转到中间；无脚本时退化为三个方向平铺。
   各方向的导航语不放在按钮里，只在下方显示当前方向那句。 */
.p-dirs { position: relative; height: 84px; overflow: hidden; }
.p-dir { position: absolute; left: 50%; top: 8px; width: min(460px, 92%); padding: 0; text-align: center; transition: left .55s var(--ease), transform .55s var(--ease), opacity .45s var(--ease); will-change: left, transform; }
.p-dir__title { display: block; font-size: 24px; font-weight: 400; letter-spacing: -.02em; white-space: nowrap; }
.p-dirs.is-carousel .p-dir--current { transform: translateX(-50%); opacity: 1; z-index: 2; }
.p-dirs.is-carousel .p-dir--current .p-dir__title { color: #204ca3; }
.p-dirs.is-carousel .p-dir--prev { left: 2%; transform: translateX(-50%) scale(.8); opacity: .35; }
.p-dirs.is-carousel .p-dir--next { left: 98%; transform: translateX(-50%) scale(.8); opacity: .35; }
.p-dir__slogan { text-align: center; font-size: 15px; color: var(--muted); line-height: 1.7; margin: 4px 0 0; min-height: 1.7em; }
.p-tabs { display: flex; gap: 30px; min-width: 0; overflow-x: auto; scrollbar-width: none; border-bottom: 1px solid var(--line); margin-top: 30px; }

/* 无脚本回退：三个方向平铺，全部可读 */
.p-dirs:not(.is-carousel) { display: flex; gap: 54px; height: auto; overflow: visible; }
.p-dirs:not(.is-carousel) .p-dir { position: static; width: auto; transform: none; opacity: 1; }
.p-dirs:not(.is-carousel) .p-dir__title { font-size: 21px; }
.p-tabs::-webkit-scrollbar { display: none; }
.p-tabs button { flex: 0 0 auto; position: relative; font-size: 16px; color: #767d88; padding: 10px 0 17px; transition: color .3s var(--ease); }
/* 选中标签的下划线兼作轮播进度条：--tab-progress 由 main.js 每帧写入（0→1），
   无 JS 或动效被暂停时取默认 1（完整下划线）。进度每帧更新，所以不加过渡。 */
.p-tabs button::after { content: ""; position: absolute; bottom: -1px; left: 0; width: 100%; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; }
.p-tabs button[aria-selected="true"] { color: #204ca3; }
.p-tabs button[aria-selected="true"]::after { transform: scaleX(var(--tab-progress, 1)); }
.p-panel { display: flex; flex-direction: column; gap: 100px; padding-top: 52px; }
.p-panel__cat { display: none; }
.product-switch.is-tabbed .p-panel { gap: 0; }
.product-switch.is-tabbed .p-panel__cat { display: block; font-size: 13px; color: var(--subtle); letter-spacing: .02em; margin-bottom: 26px; }
.product-switch.is-tabbed .p-card { display: none; }
.product-switch.is-tabbed .p-card.is-active { display: grid; }
.product-switch.is-tabbed .p-card:nth-child(even),
.product-switch.is-tabbed .p-card.is-active { grid-template-columns: .8fr 1.2fr; }
.product-switch.is-tabbed .p-card:nth-child(even) .p-card__media { grid-column: 2; }
.product-switch.is-tabbed .p-card:nth-child(even) .p-card__body { grid-column: 1; }

/* ---------- 视频首帧做底 ----------
   有真实素材时用它当画面，蓝色波形降到半透明叠在上面；
   素材没准备好（pending）就完全不加这个类，保持原来的纯波形。 */
.p-still { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .7s var(--ease); }
.p-still.is-ready { opacity: 1; }
.p-card__media.has-still .product-art canvas { opacity: .5; transition: opacity .6s var(--ease); }
.p-card__media.has-still .art-type { opacity: 0; transition: opacity .5s var(--ease); }
.p-card__media.has-still .art-caption { opacity: .8; transition: opacity .5s var(--ease); }
.product-art { position: absolute; inset: 0; }
.product-art canvas { width: 100%; height: 100%; display: block; }
.product-art svg { width: 100%; height: 100%; }
.media--translate { background: radial-gradient(ellipse at 25% 20%, #fff, transparent 70%), #e6f0ff; }
.media--voiceengine { background: radial-gradient(ellipse at 70% 20%, #fff, transparent 65%), #e9f0fc; }
.media--asr { background: linear-gradient(140deg, #f5f8ff, #e0eaff); }
.media--agent { background: radial-gradient(ellipse at 50% 55%, #bed6ff, #edf4ff 67%); }
.media--spatial { background: radial-gradient(ellipse at 65% 50%, #284a8a, #132348 72%); color: #fff; }
.media--spatial .art-caption { color: #b1c8ed; }
.media--voiceid { background: linear-gradient(145deg, #eef4ff, #d8e7ff); }
.art-type { position: absolute; top: 26%; left: 12%; font-size: clamp(26px, 3.3vw, 55px); font-weight: 300; letter-spacing: -.045em; color: #275eaa; line-height: 1.5; }
.art-type span { display: block; }
.art-type span:last-child { margin-left: 70px; color: #6d95d0; }
.art-caption { position: absolute; left: 32px; top: 25px; font-size: 12px; letter-spacing: .06em; color: #647fa6; }
.art-caption--right { left: auto; right: 32px; }

/* 舞台大画面里的产品专属视觉（脚本从产品卡复制而来） */
.hero-art { position: absolute; inset: 0; pointer-events: none; }
.hero-art--voiceengine .art-caption { top: auto; bottom: 205px; left: 44px; }
.hero-art--voiceengine .art-caption--right { left: auto; right: 44px; }
.hero-art--vui-agent .voice-orb { width: 24%; left: 38%; top: 13%; }
.hero-art--vui-agent .orb-label { bottom: 30%; font-size: 16px; }
.hero-art--voiceid .voice-print { width: 44%; left: 28%; top: 27%; height: 34%; }
.transcript { position: absolute; inset: 20% 13% auto; }
.transcript p { font-size: clamp(23px, 2.3vw, 36px); letter-spacing: -.02em; color: #204571; margin-bottom: 13px; }
.transcript p:last-child { color: #6492d5; }
.transcript em { font-style: normal; border-right: 2px solid var(--blue); padding-right: 4px; animation: caretBlink 1.5s step-end infinite; }
.voice-orb { position: absolute; width: 36%; aspect-ratio: 1; border-radius: 50%; left: 32%; top: 22%; background: radial-gradient(circle at 32% 24%, #fff 0%, #e3efff 18%, #94bdf8 47%, #4d88de 70%, #2768c7 100%); box-shadow: inset -10px -16px 22px #164dab40, 0 35px 50px #28599a20; animation: orbBreathe 7s ease-in-out infinite; }
.voice-orb::after { content: ""; position: absolute; inset: 12%; border-radius: 50%; background: linear-gradient(130deg, #ffffff70, transparent 65%); filter: blur(5px); }
.orb-label { position: absolute; bottom: 21%; left: 0; right: 0; text-align: center; color: #3b70b9; font-size: 15px; letter-spacing: .2em; }
/* container-type 让下面的扫描线能用 cqw（容器宽度单位）做位移，
   从而把动画从 left（每帧重排）换成 transform（纯合成）。 */
.voice-print { position: absolute; width: 55%; height: 42%; left: 22.5%; top: 25%; display: flex; align-items: center; gap: 5px; container-type: inline-size; }
.voice-print i { flex: 1; height: calc(20% + var(--level) * 1%); background: linear-gradient(#90b5ee, #326bc8); border-radius: 5px; animation: printBreathe 4s ease-in-out infinite; animation-delay: calc(var(--level) * -30ms); }
.voice-print::after { content: ""; position: absolute; height: 130%; top: -15%; left: 0; width: 1px; background: #2563eb; box-shadow: 0 0 20px 5px #4b85ff20; animation: scanAcross 6s ease-in-out infinite; }
.play-btn { position: absolute; left: 28px; bottom: 24px; display: inline-flex; align-items: center; justify-content: center; gap: 11px; min-height: 44px; padding: 11px 18px; border-radius: 50px; background: #fffffff0; border: 1px solid #fff; color: #27549a; font-size: 13px; z-index: 2; transition: background .3s, transform .3s var(--ease); }
.play-btn:hover { background: #fff; transform: translateY(-3px); }
.play-btn__icon { display: inline-block; width: 0; height: 0; border-left: 6px solid currentColor; border-block: 4px solid transparent; }
.play-btn__arrow { margin-left: 12px; }
@keyframes caretBlink { 50% { border-color: transparent; } }
@keyframes orbBreathe { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-10px) scale(1.025); } }
@keyframes printBreathe { 0%, 100% { transform: scaleY(.8); } 50% { transform: scaleY(1); } }
/* 扫描线位移改用 transform：left/right 这类几何属性每帧都要重排版面，
   transform 只走合成，画面完全一致。100cqw = 容器（.voice-print）的整宽。 */
@keyframes scanAcross { 0%, 100% { left: 0; transform: translateX(0); opacity: .1; } 50% { left: 0; transform: translateX(100cqw); opacity: .9; } }
.product-art:not(.is-visible) * { animation-play-state: paused !important; }

/* ---------- 产品舞台：大画面滚筒（2026-10-16） ----------
   轨道上每个版面等宽，当前版面居中，两侧直接露出前后两个版面；
   点两侧版面或用标签 / 箭头切换，整条轨道平滑滚过去。
   脚本没加载时只有一个版面占满整行，六个产品在下方照常全部展开。 */
.section--stage { padding: 10px 0 96px; }
/* 滚筒横向贯通整屏：突破 container 的左右留白做成横幅，
   主版面居中，两侧版面一路淡出到屏幕边缘（body 有 overflow-x: clip，不会出横向滚动条） */
/* 恢复横贯整屏：突破 container 的左右留白做成横幅，两侧版面一路淡出到屏幕边缘。
   100vw 含滚动条宽度，会比可见区宽出约一个滚动条，居中后两边各溢出几像素，
   由 body 的 overflow-x: clip 吃掉，不会出现横向滚动条。 */
.stage { width: 100vw; margin-inline: calc(50% - 50vw); min-width: 0; }
.stage-track { position: relative; display: flex; gap: 16px; overflow-x: hidden; --edge-fade: 19%; }
/* 两侧渐隐：版面越靠边越透明，柔和地淡出边界，而不是被硬生生裁断。
   用 mask（真透明）而不是纯色蒙版，这样深浅背景下都不会露出色块边缘。
   --edge-fade 约等于单侧露出的宽度：渐隐区刚好落在露出的相邻版面上。 */
.stage-track.is-carousel {
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 var(--edge-fade), #000 calc(100% - var(--edge-fade)), transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, #000 var(--edge-fade), #000 calc(100% - var(--edge-fade)), transparent 100%);
}
.stage-slide { flex: 0 0 100%; min-width: 0; position: relative; transition: opacity .45s var(--ease); }
.stage-track.is-carousel .stage-slide { flex-basis: 62%; }
.stage-slide.is-off { opacity: .45; cursor: pointer; }
.stage-slide.is-off:hover { opacity: .72; }
.stage-slide.is-off canvas { display: none; }
.stage-slide.is-off * { pointer-events: none; }

/* 大画面里的视频首帧做底：有真实素材时铺在波形下面，波形降到半透明 */
.feature-stage.has-still canvas { opacity: .5; transition: opacity .6s var(--ease); }
/* 首帧做底时文案仍然保留，只是换成浅色才压得住深色底图 */
.feature-stage.has-still .feature-greeting { opacity: 1; color: #dce8fb; }
.feature-stage.has-still .feature-greeting span:last-child { color: #b7cdf2; }
/* 底图是深色画面时，顶部与左下的小字换成浅色才看得清 */
.feature-stage.has-still .feature-category { color: #c9dcfa; }
.feature-stage.has-still .feature-kind { color: #d7e5fb; }

/* 当前产品的正文与能力短语，脚本从对应产品里取：
   左侧是介绍文字，右侧是核心能力——带小标题的规格式列表，与正文顶部对齐 */
/* 舞台下方左右两栏：左边导航 + 产品说明，右边核心能力网格——右侧顶部与左侧导航栏齐平 */
.stage-layout { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-areas: "nav" "detail" "aside"; gap: 0; align-items: start; }
.stage-layout .stage-nav__row { grid-area: nav; }
.stage-detail { grid-area: detail; margin-top: 26px; padding: 0 2px;  min-width: 0;}
.stage-detail:empty { display: none; }
.stage-detail__desc { font-size: 16.5px; color: var(--muted); line-height: 2; }
.stage-aside { grid-area: aside; margin-top: 34px; min-width: 0; }
.stage-aside:empty { display: none; }
/* 注意：网格卡片渲染在 .stage-aside 里（与左栏说明分开），两条选择器都要有 */
.stage-detail .tag-list, .stage-aside .tag-list { flex: none; max-width: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
/* 宽屏：能力短语跟在介绍文字下面，四个排成一排 */
.stage-aside .tag-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stage-detail .tag-list li, .stage-aside .tag-list li { font-size: 14px; color: #33405a; padding: 15px 16px; background: #f5f8fe; border: 1px solid #e5edfb; border-radius: 12px; gap: 9px; align-items: center; }
.stage-detail .tag-list li::before, .stage-aside .tag-list li::before { width: 5px; height: 5px; background: var(--blue); flex-shrink: 0; }
/* 轮播进度细线：走完一格代表即将切到下一个版面，给人可预期的节奏 */
/* 轮播进度线已并入标签下划线（--tab-progress），不再单独画横线 */

/* 导航栏：方向轮转在上，产品标签在下 */
.stage-nav { padding-top: 20px; }
.stage-nav__row { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 18px; }
.stage-nav__row > [role="tablist"] { flex: 0 1 auto; min-width: 0; width: fit-content; max-width: 100%; }
.p-tabs { margin-top: 0; }
/* 合并后六个产品的完整内容只做数据源，切换结果在上面的大画面里 */
.product-switch.is-tabbed .p-panel { display: none; }

/* ---------- 收尾：一句总结 ---------- */
.stage-finale { padding: 26px 0 118px; text-align: center; }
.stage-finale h2 { font-size: clamp(28px, 2.6vw, 42px); font-weight: 400; letter-spacing: -.035em; line-height: 1.45; }
.stage-finale p { margin-top: 14px; font-size: 16px; color: var(--muted); }

/* ---------- 应用场景（占位滚筒，与产品舞台同一套视觉） ---------- */
.section--stories { padding-top: 96px; }
/* ---------- 覆盖式滚动：前屏停住，后屏整层盖上来（滚动始终交给浏览器） ----------
   .front 是首屏 + 产品舞台，滚到末尾后整屏停住；.back 是应用场景及其后所有内容，
   它是独立的一层，从下方整层拉上来盖住前屏。滚轮、键盘、锚点全部照常。
   窄屏与无脚本不启用（根元素没有 .js），退化为原来的连续滚动。 */
@media (min-width: 1081px) {
  /* 前屏固定为一屏、从上到下不跟随滚动；后屏整层从下方盖上来。
     front 脱离文档流后由 .front-slot 顶住它原本占的高度（motion.js 同步）。 */
  .js .front { position: fixed; top: 0; left: 0; right: 0; z-index: 0; }
  /* 后屏（03 应用场景）与第三屏（收尾 + FAQ + 联系）各自是一层。
     后屏同样固定不动，让第三屏从下方盖上来——翻页手感与第一屏切第二屏一致；
     它脱离文档流后由 .back-slot 顶住原本占的高度。 */
  .js .back { position: fixed; top: 0; left: 0; right: 0; z-index: 1; background: var(--paper); }
  .js .screen3 { position: relative; z-index: 1; background: var(--paper); }
  /* 第三屏 = 收尾 + FAQ + 联系，要压进一屏才像「翻页」。
     整体在视口里垂直居中（内容不满一屏时上下留白均衡，不再顶在顶部）；
     容器上下各留 76px 兜底（> 固定导航高度，矮视口下标题也不会被压住）。 */
  .js .screen3 { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 76px 0; }
  .js .screen3 .stage-finale { padding: 10px 0 8px; }
  .js .screen3 .section--faq { padding: 24px 0 18px; }
  .js .screen3 .section--contact { padding: 16px 0 8px; }
}

/* ---------- 03 应用场景：占满一屏（只在脚本就绪的宽屏生效） ----------
   内容尺寸一律不动，只是让这一屏至少满屏、内容垂直居中。
   底色跟随所在屏：在 01/02 屏时是白，切到 03 后渐变成 --wash（与整屏切换动画同步，
   由 motion.js 切换 .back 上的 is-tinted），反向退回时再渐变回白。 */
@media (min-width: 1081px) and (min-height: 620px) {
  .js .story-sticky { min-height: 100vh; display: flex; align-items: center; background: var(--paper); transition: background-color .6s var(--ease); }
  .js .back.is-tinted .story-sticky { background: var(--wash); }
  /* 03 屏也要正好一屏：.section 默认有 105px 上下留白，留着会让翻页时先露出一段白边，
     盖上来就不像「整屏被替换」 */
  .js .section--stories { padding: 0; }
}
.story-tabs { display: flex; gap: 30px; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.story-tabs::-webkit-scrollbar { display: none; }
.story-tabs button { position: relative; flex: 0 0 auto; font-size: 14px; color: #767d88; padding: 10px 0 15px; transition: color .3s var(--ease); }
.story-tabs button::after { content: ""; position: absolute; bottom: 4px; left: 0; width: 100%; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; }
.story-tabs button[aria-selected="true"] { color: #204ca3; }
.story-tabs button[aria-selected="true"]::after { transform: scaleX(var(--tab-progress, 1)); }

.section--dark { margin-top: 65px; background: linear-gradient(130deg, #f5f8ff, #f0f5ff); }
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 50px; }
.scene { padding: 30px 0; border-top: 1px solid #dce4f2; }
.scene h3 { font-size: 22px; font-weight: 400; }
.scene p { font-size: 15px; color: var(--muted); margin-top: 15px; line-height: 1.9; }
.scene__stack { color: #3767b0; font-size: 13px; margin-top: 20px; }
.section--cases { padding-bottom: 55px; }
.logo-wall { display: flex; justify-content: space-between; gap: 25px; padding: 20px 0 40px; color: #818998; font-size: 12px; }
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 44px; }
.case { border-top: 1px solid var(--line); padding-top: 28px; }
.case__industry { font-size: 13px; color: var(--blue); }
.case h3 { margin-top: 17px; font-size: 23px; font-weight: 400; line-height: 1.6; }
.case p { margin-top: 15px; font-size: 15px; color: var(--muted); line-height: 1.9; }
.case__metrics { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 32px; }
.case__metrics div { display: flex; flex-direction: column; }
.case__metrics b { font-size: 30px; font-weight: 400; }
.case__metrics span { font-size: 13px; color: var(--muted); }
.section--tech { padding-top: 75px; }
.tech-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 44px; }
.tech { border-top: 1px solid var(--line); padding-top: 28px; }
.tech__icon { display: none; }
.tech h3 { font-size: 23px; font-weight: 400; }
.tech p { margin-top: 17px; font-size: 15px; color: var(--muted); line-height: 1.9; }
.metric-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; border-top: 1px solid var(--line); padding-top: 40px; margin-top: 48px; }
.metric-band div { display: flex; flex-direction: column; gap: 8px; }
.metric-band b { font-size: 42px; letter-spacing: -.04em; font-weight: 400; color: #245cbc; }
.metric-band span { font-size: 14px; color: var(--muted); }
.section--dev { background: var(--wash); }
.dev { display: grid; grid-template-columns: 1.1fr 1fr; gap: 100px; }
.dev__text, .dev__cards { min-width: 0; }
.dev .sec-desc { margin-top: 22px; }
.dev__code { background: #152039; border-radius: 12px; margin-top: 32px; overflow: hidden; }
.dev__code-bar { display: flex; align-items: center; gap: 7px; padding: 16px 22px; border-bottom: 1px solid #ffffff16; }
.dev__code-bar i { width: 7px; height: 7px; border-radius: 50%; background: #5f7096; }
.dev__code-bar span { margin-left: 12px; font-size: 12px; color: #b1bedb; }
.dev__code pre { padding: 25px; overflow-x: auto; }
.dev__code code { font: 13px/1.9 Consolas, monospace; color: #cbdaff; }
.dev__cards { display: flex; flex-direction: column; }
.dev-card { position: relative; border-bottom: 1px solid var(--line); padding: 29px 36px 29px 0; }
.dev-card:first-child { padding-top: 5px; }
.dev-card h3 { font-size: 23px; font-weight: 400; transition: color .2s; }
.dev-card:hover h3 { color: var(--blue); }
.dev-card p { font-size: 15px; color: var(--muted); margin-top: 10px; }
.dev-card__go { display: inline-block; margin-top: 17px; color: var(--blue); font-size: 13px; }
.section--faq .container { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }
.section--faq .sec-head { display: block; }
.section--faq .sec-desc { margin-top: 22px; }
.faq { border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 22px; text-align: left; padding: 25px 0; font-size: 17px; }
.faq__q:hover { color: var(--blue); }
.faq__q span { width: 14px; height: 14px; position: relative; flex-shrink: 0; }
.faq__q span::before, .faq__q span::after { content: ""; position: absolute; background: currentColor; }
.faq__q span::before { height: 1px; width: 14px; top: 6px; }
.faq__q span::after { width: 1px; height: 14px; left: 6px; transition: transform .3s; }
.faq__item.is-open .faq__q span::after { transform: scaleY(0); }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq__a p { padding: 0 24px 25px 0; color: var(--muted); font-size: 15px; line-height: 1.9; }

.contact { display: flex; justify-content: center; text-align: center; }
.contact__text { max-width: 760px; }
.contact-link { display: inline-flex; align-items: baseline; gap: 3px; margin-left: 6px; color: var(--blue); border-bottom: 1px solid #b9d0f5; transition: color .25s var(--ease), border-color .25s var(--ease); }
.contact-link span { font-size: .8em; transition: transform .25s var(--ease); }
.contact-link:hover { color: #1d4fa8; border-color: #1d4fa8; }
.contact-link:hover span { transform: translate(2px, -2px); }
.contact__hint { margin-top: 14px; font-size: 13px; color: var(--subtle); line-height: 1.8; }
.contact__hint:empty { display: none; }
/* 内 / 外网联系入口：默认（含无脚本、域名未识别）只显示对外邮箱，
   只有 head 内联脚本识别到内网域名才切到企微入口。邮箱用内联文字链接，
   不套 .contact-link 的胶囊，保持联系区原有高度（第三屏要压进一屏）。 */
.contact-entry--internal { display: none; }
html[data-site="internal"] .contact-entry--internal { display: inline; }
html[data-site="internal"] .contact-entry--external { display: none; }
.contact-mail { color: var(--blue); border-bottom: 1px solid #b9d0f5; transition: color .25s var(--ease), border-color .25s var(--ease); }
.contact-mail:hover { color: #1d4fa8; border-color: #1d4fa8; }
html[data-theme] .contact-mail { color: var(--accent); border-bottom-color: currentColor; }
.contact-entry__sep { margin: 0 4px; color: var(--subtle); }
.contact__text, .contact__form { min-width: 0; }
.contact .sec-desc { margin-top: 22px; }
/* footer 在 main（前屏/后屏两层）之外：不加层级会被固定住的前屏压在下面透出内容 */
.footer { position: relative; z-index: 1; background: var(--wash); padding: 48px 0 48px; border-top: 1px solid #edf0f5; }
.footer__wordmark { display: none; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 60px; }
.footer__brand p { margin-top: 15px; max-width: 280px; font-size: 14px; color: var(--muted); }
.footer__copy { margin: 0; font-size: 12px; color: var(--muted); white-space: nowrap; }
/* 版本号不在页面上显示，只作为 bump-version / stamp-assets 读写版本的标记 */
.footer__version { display: none; }

.modal { position: fixed; inset: 0; z-index: 300; padding: 24px; display: flex; align-items: center; justify-content: center; visibility: hidden; opacity: 0; transition: opacity .3s; }
.modal.is-open { visibility: visible; opacity: 1; }
.modal__backdrop { position: absolute; inset: 0; background: #0b142bc9; backdrop-filter: blur(10px); }
.modal__panel { position: relative; z-index: 1; width: min(1040px, 100%); max-height: calc(100dvh - 48px); background: #fff; border-radius: 18px; overflow-y: auto; transform: translateY(15px) scale(.985); transition: transform .4s var(--ease); }
.modal.is-open .modal__panel { transform: none; }
.modal__close { position: absolute; top: 14px; right: 14px; z-index: 3; border-radius: 50%; width: 38px; height: 38px; background: #ffffffd9; color: #243652; font-size: 23px; }
.modal__close:hover { background: #fff; }
.modal__switch { display: flex; flex-wrap: wrap; gap: 8px; padding: 16px 65px 16px 20px; background: #edf3ff; }
.modal__switch:empty { display: none; }
.modal__chip { border: 1px solid #b8cae8; border-radius: 40px; padding: 8px 16px; font-size: 13px; color: #4c648b; }
.modal__chip.is-active { background: var(--blue); border-color: var(--blue); color: #fff; }
.modal__media { aspect-ratio: 16/9; max-height: 64dvh; background: #e8f0ff; }
.modal__media video, .modal__media iframe { display: block; width: 100%; height: 100%; object-fit: contain; border: 0; }
.modal__placeholder { height: 100%; padding: 28px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; text-align: center; background: radial-gradient(ellipse at 65% 30%, #fff, #e2edff); }
.modal__placeholder::before { content: "▷"; width: 70px; height: 70px; display: grid; place-items: center; border: 1px solid #9ab8ea; border-radius: 50%; color: #3165b3; font-size: 25px; }
.modal__placeholder b { font-size: 25px; font-weight: 400; }
.modal__placeholder span { max-width: 370px; font-size: 14px; color: #5c7294; line-height: 1.9; }
.modal__meta { padding: 26px 30px; }
.modal__meta h3 { font-size: 23px; font-weight: 500; }
.modal__meta p { margin-top: 8px; font-size: 15px; color: var(--muted); }
.focus-guard { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
body.is-locked { overflow: hidden; }
.reveal { opacity: 1; }
.motion-paused *, .motion-paused *::before, .motion-paused *::after,
.motion-suspended *, .motion-suspended *::before, .motion-suspended *::after { animation-play-state: paused !important; }
.motion-paused { scroll-behavior: auto; }

@media (min-width: 1600px) {
  .feature-stage { min-height: 620px; }
  .product-grid { gap: 120px; }
  .p-panel { gap: 120px; }
  .p-card__media { aspect-ratio: 1.55; }
}
@media (max-width: 1200px) {
  :root { --gutter: 48px; }
  .nav__inner { gap: 25px; }
  .nav__links { gap: 20px; }
  /* 窄屏下拉同样以右边缘为准向左展开；桌面的 right 定位在这里继续生效 */
  .dropdown { width: 620px; }
  .feature-stage { min-height: 510px; }
  .feature-bottom { padding: 200px 36px 36px; gap: 24px; }
  .feature-actions { flex-direction: column; align-items: stretch; }
  .feature-category { left: 36px; }
  .feature-tabs { gap: 20px; }
  .feature-controls .motion-toggle [data-motion-label] { display: none; }
  .stage-track { gap: 12px; }
  .stage-track.is-carousel .stage-slide { flex-basis: 88%; }
  .story { column-gap: 6%; }
  .story__metrics { gap: 24px; }
  .cat-head > div:first-child { gap: 40px; }
  .cat-head .sec-desc { max-width: 480px; }
  .p-card { gap: 6%; }
  .p-card__tagline { font-size: 20px; }
  .sec-head { gap: 50px; }
  .dev, .contact { gap: 60px; }
}
@media (max-width: 1080px) {
  .nav__links { display: none; }
  .nav__actions { margin-left: auto; }
  .nav__toggle { display: block; }
  .nav.is-open .nav__links { display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 5px; background: #fff; padding: 22px var(--gutter); max-height: calc(100dvh - var(--nav-h)); overflow-y: auto; border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px #2035570a; }
  .nav.is-open .nav__dropbtn { width: 100%; }
  .nav.is-open .dropdown { position: static; display: none; width: 100%; padding: 18px 0; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; box-shadow: none; border: 0; transform: none; }
  .nav.is-open .nav__item.is-open .dropdown { display: grid; }
  .hero__heading > p { max-width: 230px; }
  .feature-nav { flex-wrap: wrap; gap: 10px; }
  .feature-tabs { flex: 1; }
  .feature-controls { gap: 5px; }
  .feature-tabs button { font-size: 13px; }
  .feature-step { width: 30px; height: 30px; }
  .overview-grid { gap: 25px; }
  .ov-card h3 { font-size: 18px; }
  .ov-card__items { font-size: 12px; }
  .cat-head > div:first-child { display: block; }
  .cat-head .sec-desc { margin-top: 18px; max-width: 680px; padding-top: 0; }
  .p-card, .p-card:nth-child(even) { grid-template-columns: 1fr 1.05fr; gap: 40px; }
  .product-switch.is-tabbed .p-card,
  .product-switch.is-tabbed .p-card:nth-child(even) { grid-template-columns: 1fr 1.05fr; gap: 40px; }
  .p-card__media { aspect-ratio: 1.1; }
  .p-dir__title { font-size: 20px; }
  .p-dirs { height: 72px; }
  .p-card__body h3 { font-size: 34px; }
  .p-card__tagline { font-size: 19px; }
  .p-card__desc { font-size: 16px; }
  .tag-list { margin-top: 22px; }
  .story__media { aspect-ratio: 1.2; }
  .story__body h3 { font-size: 30px; }
  .scene-grid { gap: 0 32px; }
  .case-grid, .tech-grid { gap: 30px; }
  .case h3, .tech h3 { font-size: 21px; }
  .logo-wall { gap: 15px; font-size: 10px; flex-wrap: wrap; }
  .section--faq .container { gap: 50px; grid-template-columns: .65fr 1fr; }
  .cta-band h2 { font-size: 34px; }
  .cta-band__inner { gap: 35px; }
  /* 中等宽度就切成上下结构：两列并排在半宽页面里会把能力区挤变形 */
  /* 中等宽度起切成上下：导航 → 说明 → 能力网格，避免右栏被挤成竖条 */
  .stage-layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "nav" "detail" "aside"; }
  .stage-detail { margin-top: 24px;  min-width: 0;}
  /* 窄屏回到两列，四个一排会挤成细条 */
  .stage-aside .tag-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stage-detail .tag-list, .stage-aside .tag-list { margin-top: 12px; gap: 10px; }
  .stage-detail .tag-list li, .stage-aside .tag-list li { font-size: 13px; padding: 12px 14px; }
}
@media (max-width: 760px) {
  :root { --gutter: 24px; --nav-h: 68px; }
  [id] { scroll-margin-top: 90px; }
  .nav__inner { gap: 12px; }
  .logo-text { font-size: 24px; }
  .nav__actions { gap: 8px; }
  .nav__actions .btn { font-size: 12px; padding: 8px 15px; }
  .nav.is-open .dropdown { grid-template-columns: 1fr; gap: 14px; }
  .dropdown h5 { margin-bottom: 5px; }
  .dropdown a { padding-block: 9px; }
  .hero { padding-top: calc(var(--nav-h) + 36px); }
  .hero__heading { display: block; margin-bottom: 24px; }
  .hero__title { font-size: clamp(25px, 5.8vw, 36px); }
  .hero__heading > p { max-width: none; margin-top: 13px; font-size: 12px; padding: 0; }
  .feature-stage { min-height: 510px; aspect-ratio: auto; border-radius: 18px; }
  .feature-bottom { min-height: 510px; aspect-ratio: auto; flex-direction: column; align-items: stretch; justify-content: end; gap: 25px; padding: 200px 26px 28px; }
  .feature-copy { max-width: 100%; }
  .feature-copy h2 { font-size: clamp(39px, 8.6vw, 65px); }
  .feature-kind { font-size: 13px; }
  .feature-summary { font-size: 14px; margin-top: 14px; }
  .feature-category { left: 26px; top: 25px; font-size: 11px; }
  .feature-greeting { top: 23%; right: 10%; font-size: 29px; }
  .feature-greeting span:last-child { margin-left: 0; }
  .feature-actions { flex-direction: row; gap: 10px; }
  .feature-actions .btn { padding: 10px 17px; font-size: 12px; gap: 13px; }
  .feature-nav { display: grid; grid-template-columns: minmax(0, 1fr); padding-top: 8px; gap: 4px; }
  .feature-tabs { gap: 22px; }
  .feature-tabs button { font-size: 13px; }
  .feature-controls { justify-content: end; }
  .feature-controls .motion-toggle [data-motion-label] { display: inline; }
  .feature-step { width: 34px; height: 34px; }
  .section { padding: 70px 0; }
  .section--overview { padding: 75px 0 25px; }
  .sec-title { font-size: 30px; }
  .sec-head { display: block; margin-bottom: 32px; }
  .sec-head .sec-desc { margin-top: 20px; font-size: 15px; padding-top: 0; }
  .overview-grid { display: block; }
  .ov-card { display: block; padding: 20px 30px 20px 0; }
  .ov-card h3 { font-size: 18px; }
  .ov-card__items { font-size: 13px; margin-top: 5px; }
  .ov-card__arrow { top: 22px; }
  .section--cat { padding: 65px 0 15px; }
  .cat-head { margin-bottom: 40px; }
  .cat-head .sec-desc { font-size: 15px; }
  .product-grid { gap: 60px; }
  .p-card, .p-card:nth-child(even) { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
  .product-switch.is-tabbed .p-card.is-active { display: flex; }
  .p-panel { gap: 60px; }
  .p-dirs { height: 64px; }
  .p-dir { top: 4px; }
  .p-dir__title { font-size: 18px; }
  .p-dir__slogan { font-size: 14px; }
  .p-tabs { margin-top: 20px; }
  .p-card__body { order: -1; padding: 0 0 28px; }
  .p-card__body h3 { font-size: 36px; }
  .p-card__tagline { font-size: 20px; margin-top: 15px; }
  .p-card__desc { font-size: 15px; margin-top: 16px; }
  .p-card__media { aspect-ratio: 1.3; border-radius: 12px; }
  .tag-list { gap: 8px 16px; margin-top: 20px; }
  .tag-list li { font-size: 12px; }
  .art-type { font-size: 35px; }
  .art-caption { left: 24px; top: 20px; font-size: 10px; }
  .art-caption--right { left: auto; right: 24px; }
  .transcript p { font-size: 27px; }
  .play-btn { left: 22px; bottom: 20px; min-height: 40px; padding: 10px 15px; font-size: 12px; }
  .section--stage { padding: 6px 0 60px; }
  .stage-track { gap: 10px; --edge-fade: 6%; }
  .stage-track.is-carousel .stage-slide { flex-basis: 88%; }
  .stage-nav__row { flex-direction: column; align-items: stretch; gap: 8px; margin-top: 18px; }
  .stage-nav__row .feature-controls { justify-content: flex-end; }
  .stage-detail .tag-list, .stage-aside .tag-list { gap: 10px; }
  .stage-detail .tag-list li, .stage-aside .tag-list li { font-size: 13px; padding: 12px 14px; }
  .section--stories { padding-top: 64px; }
  .stage-finale { padding: 8px 0 76px; }
  .stage-finale p { font-size: 15px; }
  .story__body { order: -1; padding: 0 0 26px; }
  .story__media { aspect-ratio: 1.3; border-radius: 12px; }
  .story__body h3 { font-size: 28px; }
  .story__desc { font-size: 15px; margin-top: 15px; }
  .story__metrics b { font-size: 26px; }
  .section--dark { margin-top: 55px; }
  .scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 25px; }
  .scene h3 { font-size: 18px; }
  .scene p { font-size: 14px; }
  .scene__stack { font-size: 11px; }
  .case-grid, .tech-grid { grid-template-columns: 1fr; gap: 35px; }
  .logo-wall { justify-content: start; gap: 25px; padding: 5px 0 30px; }
  .case h3, .tech h3 { font-size: 24px; }
  .metric-band { grid-template-columns: repeat(2, 1fr); gap: 32px; margin-top: 36px; padding-top: 30px; }
  .metric-band b { font-size: 35px; }
  .metric-band span { font-size: 12px; }
  .dev, .contact, .section--faq .container { grid-template-columns: 1fr; gap: 36px; }
  .section--faq .sec-head { margin-bottom: 0; }
  .dev-card { padding-block: 24px; }
  .dev-card:first-child { padding-top: 10px; }
  .faq__q { font-size: 16px; }
  .cta-band { padding: 55px 0; }
  .cta-band__inner { flex-direction: column; align-items: start; gap: 28px; }
  .cta-band h2 { font-size: 32px; }
  .cta-band p { font-size: 15px; }
  .footer { padding-top: 48px; }
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 22px; }
  .footer__copy { white-space: normal; }
  .modal { padding: 14px; }
  .modal__panel { border-radius: 13px; max-height: calc(100dvh - 28px); }
  .modal__placeholder { padding: 18px; gap: 12px; }
  .modal__placeholder::before { width: 40px; height: 40px; font-size: 20px; }
  .modal__placeholder b { font-size: 18px; }
  .modal__placeholder span { font-size: 11px; }
  .modal__meta { padding: 22px; }
  .modal__meta h3 { font-size: 21px; }
  .modal__meta p { font-size: 13px; }
}
@media (max-width: 420px) {
  :root { --gutter: 20px; }
  .hero__title { letter-spacing: -.05em; }
  .feature-stage, .feature-bottom { min-height: 470px; }
  .feature-bottom { padding: 175px 20px 24px; }
  .feature-category { left: 20px; }
  .feature-copy h2 { font-size: 39px; }
  .feature-greeting { font-size: 26px; }
  .feature-actions .btn { padding: 10px 14px; }
  .stage-track.is-carousel .stage-slide { flex-basis: 95%; }
  .stage-track { --edge-fade: 2.5%; }
  .story__metrics { gap: 20px; }
  .contact__form { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .art-type { font-size: 30px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (hover: none) {
  .btn:hover, .play-btn:hover { transform: none; }
}

/* ============================================================
   素材轮播（第二屏，2026-10-22 实验版）—— 已于 2026-10-27 整体删除
   旧版 28 条视频平铺轮播（.reel / .reel-item / .reel-tabs …）下线，场景屏改为按业务分类（.cs-*）。
   下面两个类是新版场景屏仍在复用的共用控件（上一个 / 下一个、计数），予以保留。 */
.reel-count { font-size: 13px; color: var(--subtle); font-variant-numeric: tabular-nums; }
.reel-arrow {
  flex: 0 0 auto; width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  font-size: 15px; line-height: 1; cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.reel-arrow:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-1px); }
.reel-arrow:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }