/* 研思智境 首页：三屏叙事。颜色语义固定：研讨=红、课堂=蓝、AI/连接=蓝金、评价=紫、改进=橙金。
   动效只用 transform/opacity，尊重 prefers-reduced-motion。 */
:root {
  --c-red: #A6192E; --c-red-2: #8F1426; --c-red-3: #C62A3D;
  --c-blue: #163E73; --c-blue-2: #245EA8; --c-blue-3: #56A8FF;
  --c-gold: #D6A34A; --c-gold-2: #EBC46B; --c-violet: #6B4FD8; --c-orange: #E07B2E;
  /* 深色主题（默认 tokens） */
  --hx-bg-1: #081526; --hx-bg-2: #0E1C30; --hx-sec: #0d1a2d; --hx-sec-2: #102038;
  --hx-ink: #f4ecdf; --hx-ink-2: #b9c3d3; --hx-title-a: #F6DDA4; --hx-title-b: #ffffff;
  --hx-city: #1b2f4d; --hx-win: #56A8FF; --hx-line: #ffffff1f; --hx-card: #0f1d33; --hx-card-ink: #e9eef7;
  --hx-glow-r: #A6192E66; --hx-glow-b: #245EA866;
}
:root[data-theme="light"] {
  --hx-bg-1: #FFF9F3; --hx-bg-2: #F8EFE6; --hx-sec: #F8F5F0; --hx-sec-2: #FFFFFF;
  --hx-ink: #2a1c22; --hx-ink-2: #5d5358; --hx-title-a: #A6192E; --hx-title-b: #163E73;
  --hx-city: #d9c7c0; --hx-win: #f5efe9; --hx-line: #1b2a4a1a; --hx-card: #ffffff; --hx-card-ink: #2a1c22;
  --hx-glow-r: #f3c9cf; --hx-glow-b: #cfe0f8;
}

/* home 路由铺满全宽 */
body.is-home main#app { max-width: none; padding: 0; }
.hx { color: var(--hx-ink); }

/* ---------- 第一屏 ---------- */
.hx-hero { position: relative; overflow: hidden; min-height: calc(100vh - 70px); padding: clamp(18px, 3.2vh, 40px) 24px 56px; display: flex; flex-direction: column; justify-content: center; gap: clamp(14px, 2.6vh, 30px);
  background: linear-gradient(180deg, var(--hx-bg-1), var(--hx-bg-2)); isolation: isolate; }
.hx-sky { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hx-glow { position: absolute; width: 60vw; height: 60vw; border-radius: 50%; filter: blur(10px); opacity: .9; }
.hx-glow.r { left: -22vw; top: -26vw; background: radial-gradient(circle, var(--hx-glow-r), transparent 62%); }
.hx-glow.b { right: -22vw; top: -22vw; background: radial-gradient(circle, var(--hx-glow-b), transparent 62%); }
.hx-band { position: absolute; left: -30%; width: 160%; height: 90px; opacity: .5; background: linear-gradient(90deg, transparent, #EBC46B22 30%, #56A8FF22 60%, transparent); transform: rotate(-8deg); animation: hx-band 38s ease-in-out infinite alternate; }
.hx-band.a { top: 22%; } .hx-band.b { top: 58%; height: 60px; transform: rotate(6deg); animation-duration: 46s; animation-direction: alternate-reverse; opacity: .35; }
@keyframes hx-band { from { translate: -8% 0; } to { translate: 8% 0; } }
.hx-city { position: absolute; left: 0; right: 0; bottom: 18%; width: 100%; height: 34%; fill: var(--hx-city); opacity: .55; }
.hx-city .win { fill: var(--hx-win); opacity: .45; }
.hx-floor { position: absolute; left: -20%; right: -20%; bottom: -8%; height: 34%; transform: perspective(520px) rotateX(62deg); transform-origin: 50% 100%; opacity: .55;
  background-image: linear-gradient(var(--hx-line) 1px, transparent 1px), linear-gradient(90deg, var(--hx-line) 1px, transparent 1px); background-size: 56px 56px;
  mask-image: linear-gradient(0deg, #000 30%, transparent); }

.hx-intro { text-align: center; animation: hx-rise .9s cubic-bezier(.2, .7, .2, 1) both; }
.hx-eyebrow { margin: 0 0 4px; font-size: max(12px, calc(11.5px * var(--fs))); letter-spacing: .32em; text-transform: uppercase; color: var(--c-gold); font-weight: 600; }
.hx-intro h1 { margin: 0; line-height: 1.12; font-size: clamp(44px, 6.4vw, 92px); font-weight: 900; letter-spacing: .12em; padding-left: .12em;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STZhongsong", "STSong", "SimSun", serif;
  background: linear-gradient(100deg, var(--hx-title-a) 10%, var(--hx-title-b) 90%); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 6px 24px #00000026); }
.hx-sub { margin: 6px 0 0; font-size: clamp(17px, calc(1.45vw * var(--fs)), 26px); font-weight: 700; letter-spacing: .08em; color: var(--hx-ink); }
.hx-lead { margin: 6px 0 0; font-size: calc(14.5px * var(--fs)); color: var(--hx-ink-2); letter-spacing: .06em; }
.hx-lead span { color: var(--c-gold); margin: 0 .5em; }

.hx-stage { width: min(1480px, 100%); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 132px minmax(0, 1fr); gap: clamp(12px, 1.6vw, 26px); align-items: stretch; }
.hx-card { --rx: 0deg; --ry: 0deg; position: relative; display: flex; flex-direction: column; text-decoration: none; color: var(--hx-card-ink); border-radius: 22px; overflow: hidden;
  background: var(--hx-card); border: 1px solid var(--hx-line); box-shadow: 0 24px 60px #00000033;
  transform: perspective(1200px) rotateX(var(--rx)) rotateY(var(--ry)); transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease; }
.hx-card.seminar { animation: hx-from-left 1s .15s cubic-bezier(.2, .7, .2, 1) both; border-color: #C62A3D66; }
.hx-card.classroom { animation: hx-from-right 1s .15s cubic-bezier(.2, .7, .2, 1) both; border-color: #56A8FF66; }
.hx-card:hover, .hx-card:focus-visible { transform: perspective(1200px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-6px); }
.hx-card.seminar:hover, .hx-card.seminar:focus-visible { border-color: var(--c-gold-2); box-shadow: 0 30px 70px #A6192E40, 0 0 0 1px #EBC46B88, 0 0 44px #C62A3D40; }
.hx-card.classroom:hover, .hx-card.classroom:focus-visible { border-color: var(--c-blue-3); box-shadow: 0 30px 70px #163E7340, 0 0 0 1px #56A8FFaa, 0 0 44px #56A8FF40; }
.hx-card:focus-visible { outline: 3px solid var(--c-gold-2); outline-offset: 3px; }
.hx-media { position: relative; height: clamp(170px, 30vh, 330px); overflow: hidden; }
.hx-img { position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform .8s cubic-bezier(.2, .7, .2, 1); }
.hx-card:hover .hx-img, .hx-card:focus-visible .hx-img { transform: scale(1.045); }
.hx-tint { position: absolute; inset: 0; }
.hx-card.seminar .hx-tint { background: linear-gradient(180deg, #A6192E14 0%, transparent 45%, #8F142688 100%); }
.hx-card.classroom .hx-tint { background: linear-gradient(180deg, #245EA814 0%, transparent 45%, #163E7388 100%); }
.hx-scan { position: absolute; inset: 0; opacity: 0; background: linear-gradient(100deg, transparent 35%, #ffffff40 48%, transparent 60%); transform: translateX(-100%); }
.hx-card:hover .hx-scan { opacity: 1; animation: hx-scan 1.4s ease-out 1; }
.hx-card.classroom:hover .hx-scan { background: linear-gradient(100deg, transparent 35%, #9fd0ff55 48%, transparent 60%); }
@keyframes hx-scan { to { transform: translateX(100%); } }
.hx-body { flex: 1; display: flex; flex-direction: column; gap: 10px; padding: 16px 22px 18px; }
.hx-card.seminar .hx-body { background: linear-gradient(180deg, #A6192E10, transparent 70%); }
.hx-card.classroom .hx-body { background: linear-gradient(180deg, #245EA810, transparent 70%); }
.hx-head { display: flex; gap: 14px; align-items: flex-start; }
.hx-ico { flex: none; width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; color: #fff; }
.hx-ico .ic { width: 28px; height: 28px; }
.hx-card.seminar .hx-ico { background: linear-gradient(135deg, var(--c-red-3), var(--c-red-2)); box-shadow: 0 8px 20px #A6192E55; }
.hx-card.classroom .hx-ico { background: linear-gradient(135deg, var(--c-blue-3), var(--c-blue)); box-shadow: 0 8px 20px #245EA855; }
.hx-head h2 { margin: 0; font-size: calc(28px * var(--fs)); letter-spacing: .14em; font-weight: 800; }
.hx-card.seminar h2 { color: var(--c-red); } .hx-card.classroom h2 { color: var(--c-blue-2); }
:root:not([data-theme="light"]) .hx-card.seminar h2 { color: #ffb4a8; } :root:not([data-theme="light"]) .hx-card.classroom h2 { color: #9fd0ff; }
.hx-desc { margin: 4px 0 0; color: var(--hx-ink-2); font-size: calc(13.5px * var(--fs)); line-height: 1.55; }
.hx-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hx-tags span { font-size: calc(12.5px * var(--fs)); padding: 3px 12px; border-radius: 999px; border: 1px solid; }
.hx-card.seminar .hx-tags span { color: var(--c-red); border-color: #C62A3D55; background: #C62A3D12; }
.hx-card.classroom .hx-tags span { color: var(--c-blue-2); border-color: #56A8FF66; background: #56A8FF14; }
:root:not([data-theme="light"]) .hx-card.seminar .hx-tags span { color: #ffc2b8; } :root:not([data-theme="light"]) .hx-card.classroom .hx-tags span { color: #b8dcff; }
.hx-foot { margin-top: auto; display: flex; align-items: center; gap: 12px; }
.hx-cur { min-width: 0; flex: 1; font-size: calc(12.5px * var(--fs)); color: var(--c-gold); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
:root[data-theme="light"] .hx-cur { color: #8a5a1c; }
.hx-btn { position: relative; overflow: hidden; flex: none; display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; border-radius: 999px; color: #fff; font-weight: 700; font-size: calc(14.5px * var(--fs)); letter-spacing: .04em; }
.hx-btn .ic { width: 18px; height: 18px; transition: transform .25s; }
.hx-card:hover .hx-btn .ic { transform: translateX(3px); }
.hx-card.seminar .hx-btn { background: linear-gradient(120deg, var(--c-red-3), var(--c-red-2)); box-shadow: 0 8px 22px #A6192E55; }
.hx-card.classroom .hx-btn { background: linear-gradient(120deg, var(--c-blue-2), var(--c-blue)); box-shadow: 0 8px 22px #163E7355; }
.hx-btn::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, transparent 30%, #ffffff55 50%, transparent 70%); transform: translateX(-120%); }
.hx-card:hover .hx-btn::after { transition: transform .9s ease; transform: translateX(120%); }

/* 双向流转：玻璃圆形 + 暖金边框；中间克制的小型 AI 核心 */
.hx-bridge { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 14px; }
.arrow-btn.hx-arrow { width: 96px; height: 96px; background: radial-gradient(circle at 35% 30%, #ffffff30, #ffffff08 70%); border: 1.5px solid #D6A34Acc; backdrop-filter: blur(6px); box-shadow: 0 10px 30px #0000002e, inset 0 1px 0 #ffffff55; overflow: visible; }
.arrow-btn.hx-arrow:hover:not(:disabled) { background: radial-gradient(circle at 35% 30%, #ffffff45, #EBC46B22 70%); box-shadow: 0 0 0 8px #EBC46B1f, 0 0 40px #EBC46B66; }
.arrow-btn.hx-arrow:active:not(:disabled)::before { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid #EBC46B; animation: hx-ripple .6s ease-out; }
@keyframes hx-ripple { from { transform: scale(.8); opacity: 1; } to { transform: scale(1.5); opacity: 0; } }
:root[data-theme="light"] .arrow-btn.hx-arrow { background: radial-gradient(circle at 35% 30%, #ffffff, #fff6ea 75%); box-shadow: 0 10px 26px #7a4b3a26, inset 0 1px 0 #fff; }
.hx-core { display: grid; place-items: center; width: 64px; height: 64px; }
.hx-orb { width: 64px; height: 64px; filter: drop-shadow(0 0 14px #56A8FF88); }
.hx-orb ellipse.m1, .hx-orb ellipse.m2, .hx-orb ellipse.m3 { transform-box: fill-box; transform-origin: center; animation: hx-meridian 12s linear infinite; }
.hx-orb ellipse.m2 { animation-delay: -4s; } .hx-orb ellipse.m3 { animation-delay: -8s; }
@keyframes hx-meridian { 0% { transform: scaleX(1); } 50% { transform: scaleX(0); } 100% { transform: scaleX(-1); } }
.hx-more { position: absolute; left: 50%; bottom: 14px; width: 40px; height: 40px; margin-left: -20px; border-radius: 50%; display: grid; place-items: center; color: var(--c-gold); border: 1px solid #D6A34A88; background: #ffffff10; }
.hx-more .ic { width: 20px; height: 20px; transform: rotate(90deg); }
.hx-more:hover { background: #D6A34A22; }

@keyframes hx-rise { from { opacity: 0; transform: translateY(18px); } }
@keyframes hx-from-left { from { opacity: 0; transform: translateX(-40px); } }
@keyframes hx-from-right { from { opacity: 0; transform: translateX(40px); } }

/* ---------- 第二、三屏 ---------- */
.hx-sec { position: relative; padding: clamp(48px, 8vh, 88px) 24px; text-align: center; background: var(--hx-sec); }
.hx-sec + .hx-sec { background: linear-gradient(180deg, var(--hx-sec-2), var(--hx-sec)); }
.hx-h { margin: 0; font-size: clamp(26px, calc(2.2vw * var(--fs)), 40px); letter-spacing: .1em; font-weight: 800; color: var(--hx-ink);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STZhongsong", "SimSun", serif; }
.hx-h em { font-style: normal; color: var(--c-gold); margin: 0 .2em; }
.hx-disc .hx-h { color: var(--c-red); } :root:not([data-theme="light"]) .hx-disc .hx-h { color: #ffc9bd; }
.hx-p { margin: 10px auto 0; max-width: 760px; color: var(--hx-ink-2); font-size: calc(15px * var(--fs)); }
.hx-eq { list-style: none; margin: 22px auto 30px; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px 12px; }
.hx-eq li { padding: 6px 18px; border-radius: 999px; border: 1px solid var(--hx-line); background: var(--hx-sec-2); font-weight: 650; font-size: calc(14.5px * var(--fs)); }
.hx-eq li.op { border: 0; background: none; padding: 0 2px; color: var(--c-gold); font-size: calc(20px * var(--fs)); font-weight: 800; }
.hx-eq li.res { color: #fff; background: linear-gradient(120deg, var(--c-red-3), var(--c-red-2)); border-color: transparent; letter-spacing: .3em; padding-left: 22px; }
.hx-grid6 { width: min(1360px, 100%); margin: 0 auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.hx-disc-card { --rx: 0deg; --ry: 0deg; --tone: #A6192E; position: relative; overflow: hidden; display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 14px; align-items: center; text-align: left;
  min-height: 118px; padding: 18px 20px; border-radius: 18px; border: 1px solid var(--hx-line); background: var(--hx-sec-2); color: var(--hx-ink); cursor: pointer;
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)); transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; }
.hx-disc-card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(120% 140% at 100% 100%, color-mix(in srgb, var(--tone) 18%, transparent), transparent 60%); transition: transform .5s ease; z-index: 0; }
.hx-disc-card > * { position: relative; z-index: 1; }
.hx-disc-card:hover, .hx-disc-card:focus-visible { transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-4px); border-color: color-mix(in srgb, var(--tone) 55%, transparent); box-shadow: 0 16px 36px color-mix(in srgb, var(--tone) 25%, transparent), 0 0 0 1px color-mix(in srgb, var(--tone) 30%, transparent); background: var(--hx-sec-2); }
.hx-disc-card:hover::before { transform: scale(1.03); }
.hx-art { position: absolute !important; right: -14px; bottom: -22px; width: 128px; height: 128px; color: var(--tone); opacity: .13; z-index: 0 !important; transition: transform .6s ease, opacity .3s; }
.hx-art .ic { width: 100%; height: 100%; stroke-width: 1.1; }
.hx-disc-card:hover .hx-art { transform: scale(1.06) rotate(-4deg); opacity: .2; }
.hx-dico { grid-row: span 2; width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, color-mix(in srgb, var(--tone) 80%, #fff), var(--tone)); box-shadow: 0 8px 18px color-mix(in srgb, var(--tone) 35%, transparent); }
.hx-dico .ic { width: 28px; height: 28px; }
.hx-dtxt b { display: block; font-size: calc(18px * var(--fs)); letter-spacing: .08em; }
.hx-dtxt small { display: block; margin-top: 2px; color: var(--hx-ink-2); font-size: calc(13px * var(--fs)); }
.hx-dmore { grid-column: 2; margin-top: 6px; display: inline-flex; align-items: center; gap: 4px; font-size: calc(12.5px * var(--fs)); color: var(--tone); opacity: 0; transform: translateY(4px); transition: opacity .25s, transform .25s; }
.hx-dmore .ic { width: 15px; height: 15px; }
.hx-disc-card:hover .hx-dmore, .hx-disc-card:focus-visible .hx-dmore { opacity: 1; transform: none; }
.d-eng { --tone: #C62A3D; } .d-arts { --tone: #B0741F; } .d-med { --tone: #6B4FD8; } .d-biz { --tone: #245EA8; } .d-sci { --tone: #1F8A8A; } .d-soc { --tone: #2F7A4D; }
:root:not([data-theme="light"]) .hx-dmore { filter: brightness(1.5); }

/* 研—演—评—改 */
.hx-loop { list-style: none; margin: 34px auto 0; padding: 0; width: min(1180px, 100%); display: grid; grid-template-columns: repeat(4, 1fr); position: relative; }
.hx-loop::before { content: ""; position: absolute; left: 12.5%; right: 12.5%; top: 48px; height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, #C62A3D, #245EA8, #6B4FD8, #E07B2E); opacity: .35; }
.hx-loop::after { content: ""; position: absolute; left: 12.5%; right: 12.5%; top: 48px; height: 3px; border-radius: 3px;
  background: repeating-linear-gradient(90deg, #ffffffcc 0 10px, transparent 10px 34px); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); animation: hx-flow 2.6s linear infinite; opacity: .8; }
@keyframes hx-flow { from { background-position: 0 0; } to { background-position: 68px 0; } }
.hx-loop li { position: relative; z-index: 1; }
.hx-node { display: flex; flex-direction: column; align-items: center; gap: 8px; text-decoration: none; color: var(--hx-ink); padding: 0 8px; }
.hx-ring { --tone: #C62A3D; position: relative; width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center; background: var(--hx-sec-2); border: 2px solid var(--tone);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--tone) 12%, transparent); transition: box-shadow .5s, transform .3s, background .5s; }
.hx-ring .ic { position: absolute; top: 14px; width: 20px; height: 20px; color: var(--tone); }
.hx-ring b { margin-top: 16px; font-size: calc(34px * var(--fs)); line-height: 1; color: var(--tone); font-family: "Noto Serif SC", "Source Han Serif SC", "STZhongsong", "SimSun", serif; }
.n0 .hx-ring { --tone: #C62A3D; } .n1 .hx-ring { --tone: #245EA8; } .n2 .hx-ring { --tone: #6B4FD8; } .n3 .hx-ring { --tone: #E07B2E; }
:root:not([data-theme="light"]) .n1 .hx-ring { --tone: #56A8FF; } :root:not([data-theme="light"]) .n2 .hx-ring { --tone: #9d86ff; }
.hx-node:hover .hx-ring, .hx-node:focus-visible .hx-ring { transform: translateY(-3px); }
.hx-loop-sec.in .hx-ring { background: radial-gradient(circle at 35% 30%, color-mix(in srgb, var(--tone) 22%, var(--hx-sec-2)), var(--hx-sec-2)); box-shadow: 0 0 0 6px color-mix(in srgb, var(--tone) 16%, transparent), 0 0 36px color-mix(in srgb, var(--tone) 45%, transparent); transition-delay: calc(var(--i) * .35s + .2s); }
.hx-loop li { --i: 0; }
.hx-nname { font-weight: 800; font-size: calc(17px * var(--fs)); letter-spacing: .12em; }
.hx-nkeys { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 8px; color: var(--hx-ink-2); font-size: calc(13px * var(--fs)); }
.hx-nkeys span + span::before { content: "·"; margin-right: 8px; color: var(--c-gold); }
.hx-caps { width: min(1180px, 100%); margin: 44px auto 0; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
.hx-cap { position: relative; padding: 18px 12px 16px; border-radius: 16px; border: 1px solid var(--hx-line); background: var(--hx-sec-2); display: flex; flex-direction: column; align-items: center; gap: 8px; transition: transform .3s, box-shadow .3s, border-color .3s; outline: none; }
.hx-cap:hover, .hx-cap:focus-visible { transform: translateY(-3px); border-color: #D6A34A88; box-shadow: 0 14px 30px #0000001f; }
.hx-cap:focus-visible { outline: 3px solid var(--c-gold-2); outline-offset: 2px; }
.hx-cico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; color: var(--c-gold); background: #D6A34A1f; }
.hx-cico .ic { width: 24px; height: 24px; }
.hx-cap b { font-size: calc(14.5px * var(--fs)); }
.hx-cap p { margin: 0; max-height: 0; overflow: hidden; opacity: 0; color: var(--hx-ink-2); font-size: calc(12.5px * var(--fs)); line-height: 1.55; transition: max-height .35s ease, opacity .3s ease; }
.hx-cap:hover p, .hx-cap:focus-visible p, .hx-cap:focus-within p { max-height: 10em; opacity: 1; }
@media (hover: none) { .hx-cap p { max-height: none; opacity: 1; } .hx-dmore { opacity: 1; transform: none; } }
.hx-foot-note { padding: 18px 24px 28px; text-align: center; font-size: max(12px, calc(11.5px * var(--fs))); color: var(--hx-ink-2); background: var(--hx-sec); border-top: 1px solid var(--hx-line); }
.hx-lib { text-align: left; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.hx-lib b { color: var(--gold); } .hx-lib ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: calc(13px * var(--fs)); }
:root[data-theme="light"] .hx-lib b { color: #7d1628; }

/* 分段出现 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s cubic-bezier(.2, .7, .2, 1); }
.reveal.in { opacity: 1; transform: none; }
.reveal .hx-disc-card { opacity: 0; transform: translateY(16px); transition: opacity .6s ease calc(var(--i) * .08s + .15s), transform .6s ease calc(var(--i) * .08s + .15s), box-shadow .3s, border-color .3s; }
.reveal.in .hx-disc-card { opacity: 1; transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)); }
.reveal.in .hx-disc-card:hover { transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-4px); transition-delay: 0s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1280px) { .hx-caps { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-height: 800px) and (min-width: 821px) { .hx-intro h1 { font-size: clamp(40px, 5vw, 70px); } .hx-media { height: clamp(150px, 26vh, 240px); } .hx-body { padding: 12px 18px 14px; gap: 8px; } }
@media (max-width: 1000px) { .hx-grid6 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 820px) {
  .hx-hero { min-height: 0; padding: 22px 16px 60px; }
  .hx-stage { grid-template-columns: 1fr; }
  .hx-bridge { flex-direction: row; gap: 18px; }
  .arrow-btn.hx-arrow { width: 76px; height: 76px; }
  .hx-core { width: 48px; height: 48px; } .hx-orb { width: 48px; height: 48px; }
  .hx-media { height: 190px; }
  .hx-head h2 { font-size: calc(23px * var(--fs)); }
  .hx-foot { flex-wrap: wrap; } .hx-cur { flex-basis: 100%; }
  .hx-sec { padding: 44px 16px; }
  .hx-grid6 { grid-template-columns: 1fr; }
  .hx-loop { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .hx-loop::before, .hx-loop::after { display: none; }
  .hx-caps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hx-more { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .hx-band, .hx-orb ellipse, .hx-loop::after { animation: none !important; }
  .reveal, .reveal .hx-disc-card { opacity: 1 !important; transform: none !important; }
  .hx-card, .hx-disc-card { transform: none !important; }
}

/* v4.1 细节：天际线移到标题两侧；标题加重；锚点避开固定顶栏；手机端副标题排版 */
.hx-city { top: 6%; bottom: auto; height: 40%; opacity: .5; mask-image: linear-gradient(180deg, #000 55%, transparent); -webkit-mask-image: linear-gradient(180deg, #000 55%, transparent); }
.hx-intro h1 { -webkit-text-stroke: .018em #8F142666; }
:root:not([data-theme="light"]) .hx-intro h1 { -webkit-text-stroke: .014em #F6DDA455; }
.hx-h { font-family: inherit; letter-spacing: .08em; }
.hx-sec { scroll-margin-top: 70px; }
@media (max-width: 820px) {
  .hx-eyebrow { letter-spacing: .16em; }
  .hx-sub { font-size: calc(15px * var(--fs)); letter-spacing: .02em; }
  .hx-lead span[aria-hidden] { display: none; }
  .hx-lead { font-size: calc(13.5px * var(--fs)); }
}
.hx-lead .hx-l1, .hx-lead .hx-l2 { color: inherit; margin: 0; }
@media (max-width: 820px) { .hx-lead .hx-l1, .hx-lead .hx-l2 { display: block; } .hx-lead .hx-l2 { color: var(--c-gold); } }
.hx-sub, .hx-eyebrow, .hx-p, .hx-lead { text-wrap: balance; }
@media (max-width: 820px) { .hx-sub { font-size: calc(14.5px * var(--fs)); } }