/* ============================================================
   Amita · 页面样式（首页 / 向导 / 体验 / 大厅 / 案例）
   ============================================================ */

/* ============ 首页 Hero ============ */
.hero { position: relative; padding: 168px 0 96px; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid rgba(124, 92, 255, .35);
  background: rgba(124, 92, 255, .08);
  font-size: 12.5px; font-weight: 700; color: var(--t2);
  box-shadow: 0 0 24px rgba(124, 92, 255, .15);
}
.hero-badge i { width: 7px; height: 7px; border-radius: 999px; background: var(--ok); box-shadow: 0 0 10px var(--ok); font-style: normal; }
.hero h1 {
  margin: 26px auto 0;
  max-width: 820px;
  font-size: 62px;
  line-height: 1.14;
  letter-spacing: -1.5px;
  font-weight: 700;
}
.hero .sub { margin: 22px auto 0; max-width: 560px; font-size: 17px; color: var(--t2); }
.hero-cta { margin-top: 36px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 12.5px; color: var(--t3); }

/* Hero 悬浮窗预览（迷你聊天） */
.hero-visual {
  max-width: 760px;
  margin: 64px auto 0;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(17, 22, 38, .92), rgba(11, 15, 29, .85));
  backdrop-filter: blur(20px);
  box-shadow: 0 40px 120px rgba(0, 0, 0, .5), inset 0 1px 0 rgba(255, 255, 255, .07);
  text-align: left;
  overflow: hidden;
}
.hero-visual-bar { display: flex; align-items: center; gap: 8px; padding: 13px 18px; border-bottom: 1px solid var(--line); }
.hero-visual-bar i { width: 10px; height: 10px; border-radius: 999px; background: rgba(255, 255, 255, .16); }
.hero-visual-bar b { margin-left: 8px; font-size: 12px; color: var(--t3); font-weight: 600; }
.hero-visual-body { padding: 22px; display: flex; flex-direction: column; gap: 14px; min-height: 210px; }
.hv-msg { display: flex; gap: 10px; max-width: 86%; }
.hv-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.hv-msg .orb-avatar { width: 30px; height: 30px; font-size: 12px; }
.hv-bubble { padding: 10px 15px; border-radius: 14px; font-size: 13.5px; line-height: 1.65; background: var(--card-2); border: 1px solid var(--line); color: var(--t2); }
.hv-msg.user .hv-bubble { background: var(--grad); border: 0; color: #fff; }
.hv-typing { display: inline-flex; gap: 4px; padding: 12px 15px; }
.hv-typing i { width: 6px; height: 6px; border-radius: 999px; background: var(--t3); animation: blink 1.2s infinite; }
.hv-typing i:nth-child(2) { animation-delay: .18s; }
.hv-typing i:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%, 70%, 100% { opacity: .25; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-3px); } }

/* ---------- 数据带 ---------- */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .015); }
.stats-grid { max-width: 1200px; margin: 0 auto; padding: 44px 24px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; }
.stat b { display: block; font-family: var(--mono); font-size: 40px; font-weight: 700; letter-spacing: -1px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { display: block; margin-top: 6px; font-size: 13px; color: var(--t2); }

/* ---------- 能力三卡 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cap-card { padding: 30px 28px; display: flex; flex-direction: column; }
.cap-card h3 { margin-top: 20px; font-size: 20px; }
.cap-card p { margin-top: 10px; font-size: 14px; color: var(--t2); flex: 1; }
.cap-card .num { position: absolute; right: 22px; top: 18px; font-family: var(--mono); font-size: 13px; color: var(--t3); }
.cap-foot { margin-top: 22px; display: flex; align-items: center; justify-content: space-between; font-size: 13.5px; }
.cap-visual { margin-top: 18px; border-radius: 12px; border: 1px solid var(--line); background: rgba(6, 8, 16, .5); padding: 12px; display: flex; flex-direction: column; gap: 7px; min-height: 96px; }
.cap-visual .dot-row { display: flex; gap: 5px; }
.cap-visual .dot-row i { width: 7px; height: 7px; border-radius: 999px; background: rgba(255, 255, 255, .14); }
.cap-visual .line { height: 8px; border-radius: 4px; background: rgba(255, 255, 255, .07); }
.cap-visual .line.g { background: linear-gradient(90deg, rgba(124, 92, 255, .5), rgba(34, 211, 238, .4)); }
.cap-visual .line.w40 { width: 40%; } .cap-visual .line.w70 { width: 70%; } .cap-visual .line.w90 { width: 90%; } .cap-visual .line.w55 { width: 55%; }

/* ---------- 精选案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { overflow: hidden; cursor: pointer; display: flex; flex-direction: column; }
.case-cover { height: 150px; position: relative; display: grid; place-items: center; overflow: hidden; }
.case-cover::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 70% 20%, rgba(255, 255, 255, .18), transparent 55%); }
.case-cover b { position: relative; font-family: var(--mono); font-size: 34px; letter-spacing: -.5px; color: rgba(255, 255, 255, .9); text-shadow: 0 4px 24px rgba(0, 0, 0, .4); transition: transform .35s var(--ease); }
.case-card:hover .case-cover b { transform: scale(1.12); }
.case-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.case-body .tags { display: flex; gap: 7px; }
.case-body h3 { margin-top: 12px; font-size: 17.5px; line-height: 1.4; }
.case-body p { margin-top: 8px; font-size: 13px; color: var(--t2); flex: 1; }
.case-metrics { margin-top: 16px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; border-top: 1px dashed var(--line); padding-top: 14px; }
.case-metrics div b { display: block; font-family: var(--mono); font-size: 16px; color: var(--brand-b); }
.case-metrics div span { font-size: 10.5px; color: var(--t3); }

/* ---------- 流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.flow::before {
  content: ""; position: absolute; top: 27px; left: 8%; right: 8%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124, 92, 255, .5), rgba(34, 211, 238, .5), transparent);
}
.flow-step { text-align: center; position: relative; }
.flow-step i {
  width: 54px; height: 54px; margin: 0 auto;
  display: grid; place-items: center;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid rgba(124, 92, 255, .4);
  font-family: var(--mono); font-style: normal; font-size: 15px; font-weight: 700;
  color: var(--t1);
  box-shadow: 0 0 0 6px var(--bg), 0 0 26px rgba(124, 92, 255, .3);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.flow-step:hover i { transform: translateY(-4px) scale(1.06); border-color: var(--brand-b); box-shadow: 0 0 0 6px var(--bg), 0 0 34px rgba(34, 211, 238, .45); }
.flow-step h4 { margin-top: 18px; font-size: 16.5px; }
.flow-step p { margin-top: 8px; font-size: 13px; color: var(--t2); max-width: 220px; margin-left: auto; margin-right: auto; }

/* ---------- CTA 大条 ---------- */
.cta-band { text-align: center; padding: 56px 32px; border-radius: 26px; position: relative; overflow: hidden; border: 1px solid rgba(124, 92, 255, .3); background: linear-gradient(160deg, rgba(124, 92, 255, .16), rgba(34, 211, 238, .08)), rgba(11, 15, 29, .8); }
.cta-band h2 { font-size: 32px; letter-spacing: -.5px; }
.cta-band p { margin: 12px auto 0; max-width: 480px; color: var(--t2); }
.cta-band .hero-cta { margin-top: 28px; }

/* ============ 通用页面头 ============ */
.page-head { padding: 150px 0 46px; text-align: center; }
.page-head h1 { font-size: 42px; letter-spacing: -1px; margin-top: 18px; }
.page-head p { margin: 14px auto 0; max-width: 560px; color: var(--t2); }

/* ============ 智能体大厅 ============ */
.filter-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.ag-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ag-card { padding: 26px; display: flex; flex-direction: column; cursor: pointer; }
.ag-head { display: flex; align-items: center; gap: 14px; }
.ag-head .orb-avatar { width: 52px; height: 52px; font-size: 19px; }
.ag-head h3 { font-size: 18px; }
.ag-head small { display: block; margin-top: 2px; font-size: 12px; color: var(--t3); }
.ag-card > p { margin-top: 14px; font-size: 13.5px; color: var(--t2); flex: 1; }
.ag-tags { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 14px; }
.ag-foot { margin-top: 20px; display: flex; align-items: center; justify-content: space-between; border-top: 1px dashed var(--line); padding-top: 16px; }
.ag-foot span { font-size: 12px; color: var(--t3); }

/* ============ 在线体验 ============ */
.exp-layout { display: grid; grid-template-columns: 320px 1fr; gap: 20px; align-items: start; }
.exp-side { padding: 18px; position: sticky; top: 92px; max-height: calc(100vh - 120px); display: flex; flex-direction: column; }
.exp-search { display: flex; align-items: center; gap: 8px; height: 42px; padding: 0 14px; border-radius: var(--r-input); border: 1px solid var(--line); background: rgba(6, 8, 16, .5); margin-bottom: 12px; }
.exp-search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--t1); font-size: 13.5px; }
.exp-search input::placeholder { color: var(--t3); }
.exp-list { overflow-y: auto; display: flex; flex-direction: column; gap: 6px; padding-right: 4px; }
.exp-item { display: flex; align-items: center; gap: 11px; padding: 11px 12px; border-radius: 13px; border: 1px solid transparent; background: transparent; cursor: pointer; text-align: left; width: 100%; transition: all .25s var(--ease); }
.exp-item:hover { background: var(--card); transform: translateX(3px); }
.exp-item.is-on { background: var(--grad-soft); border-color: rgba(124, 92, 255, .35); }
.exp-item .orb-avatar { width: 38px; height: 38px; font-size: 14px; }
.exp-item b { display: block; font-size: 13.5px; color: var(--t1); }
.exp-item span { display: block; font-size: 11px; color: var(--t3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 190px; }

.exp-main { display: flex; flex-direction: column; min-height: calc(100vh - 190px); overflow: hidden; }
.exp-head { display: flex; align-items: center; gap: 13px; padding: 18px 22px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .02); }
.exp-head .orb-avatar { width: 44px; height: 44px; font-size: 17px; }
.exp-head h3 { font-size: 16.5px; }
.exp-head small { display: flex; align-items: center; gap: 6px; margin-top: 2px; font-size: 12px; color: var(--t3); }
.exp-head small i { width: 7px; height: 7px; border-radius: 999px; background: var(--ok); box-shadow: 0 0 8px var(--ok); font-style: normal; }
.exp-tags { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }

.exp-msgs { flex: 1; overflow-y: auto; padding: 24px 22px; display: flex; flex-direction: column; gap: 16px; }
.msg { display: flex; gap: 11px; max-width: 82%; }
.msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg .orb-avatar { width: 34px; height: 34px; font-size: 13px; }
.bubble { padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.7; background: var(--card-2); border: 1px solid var(--line); color: var(--t2); white-space: pre-wrap; }
.msg.user .bubble { background: var(--grad); border: 0; color: #fff; border-bottom-right-radius: 5px; }
.msg.bot .bubble { border-bottom-left-radius: 5px; }
.msg .bubble .caret { display: inline-block; width: 2px; height: 14px; background: var(--brand-b); vertical-align: -2px; margin-left: 2px; animation: blink .9s infinite; }

.exp-chips { display: flex; gap: 8px; flex-wrap: wrap; padding: 0 22px 12px; }
.exp-chips .chip { font-size: 12px; padding: 6px 13px; }

.exp-input-row { display: flex; align-items: flex-end; gap: 10px; padding: 14px 18px 18px; border-top: 1px solid var(--line); }
.exp-input {
  flex: 1; min-height: 46px; max-height: 130px; padding: 12px 16px;
  border-radius: 14px; border: 1px solid var(--line); background: rgba(6, 8, 16, .55);
  color: var(--t1); font-size: 14px; resize: none; outline: none; font-family: var(--font);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.exp-input:focus { border-color: rgba(124, 92, 255, .6); box-shadow: 0 0 0 3px rgba(124, 92, 255, .14); }
.exp-input::placeholder { color: var(--t3); }
.exp-send { height: 46px; padding: 0 22px; }


/* Vidu 面板品牌顶栏 */
.live-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  border-radius: 14px 14px 0 0;
  background: linear-gradient(90deg, rgba(124, 92, 255, .14), rgba(34, 211, 238, .08));
  border: 1px solid var(--line);
  border-bottom: 0;
}
.live-topbar-copy { flex: 1; min-width: 0; }
.live-topbar-copy b { display: block; font-size: 13.5px; letter-spacing: -.2px; }
.live-topbar-copy small { display: block; margin-top: 1px; font-size: 10.5px; color: var(--faint); }
.live-topbar .live-badge { position: static; }
.live-topbar + .live-stage { border-radius: 0 0 14px 14px; overflow: hidden; }
.live-stage { border-radius: 0 0 14px 14px; overflow: hidden; }

/* ============ 需求收集向导 ============ */
.brief-layout { display: grid; grid-template-columns: 1fr 340px; gap: 22px; align-items: start; }
.brief-panel { padding: 32px; }
.steps { display: flex; align-items: center; gap: 0; margin-bottom: 30px; }
.step { display: flex; align-items: center; gap: 10px; flex: none; }
.step i {
  width: 36px; height: 36px; border-radius: 999px;
  display: grid; place-items: center;
  border: 1px solid var(--line-2); background: var(--card);
  font-style: normal; font-size: 13px; font-weight: 800; color: var(--t3); font-family: var(--mono);
  transition: all .3s var(--ease);
}
.step span { font-size: 13px; font-weight: 700; color: var(--t3); transition: color .3s; }
.step.is-on i { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 0 18px rgba(124, 92, 255, .45); }
.step.is-on span { color: var(--t1); }
.step.is-done i { border-color: var(--ok); color: var(--ok); }
.step-line { flex: 1; height: 1px; margin: 0 12px; background: var(--line-2); position: relative; overflow: hidden; }
.step-line::after { content: ""; position: absolute; inset: 0; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease); }
.step-line.is-done::after { transform: scaleX(1); }

.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.scene-card { padding: 18px 16px; text-align: left; cursor: pointer; border-radius: 16px; border: 1px solid var(--line); background: var(--card); color: var(--t1); transition: all .25s var(--ease); position: relative; }
.scene-card:hover { transform: translateY(-4px); border-color: rgba(124, 92, 255, .45); background: var(--card-2); box-shadow: 0 14px 34px rgba(0, 0, 0, .35); }
.scene-card.is-on { border-color: var(--brand-a); background: var(--grad-soft); box-shadow: 0 0 0 1px rgba(124, 92, 255, .4), 0 10px 30px rgba(124, 92, 255, .2); }
.scene-card .icard { width: 40px; height: 40px; border-radius: 11px; }
.scene-card b { display: block; margin-top: 12px; font-size: 14.5px; }
.scene-card span { display: block; margin-top: 5px; font-size: 12px; color: var(--t3); line-height: 1.5; }
.scene-card .tick { position: absolute; right: 12px; top: 12px; width: 20px; height: 20px; border-radius: 999px; border: 1px solid var(--line-2); display: grid; place-items: center; font-size: 11px; color: transparent; transition: all .25s var(--ease); }
.scene-card.is-on .tick { background: var(--grad); border-color: transparent; color: #fff; }

.field-label { display: flex; align-items: baseline; justify-content: space-between; margin: 26px 0 12px; font-size: 14px; font-weight: 800; }
.field-label small { font-size: 12px; font-weight: 600; color: var(--t3); }
.chips-row { display: flex; flex-wrap: wrap; gap: 9px; }
.chips-row .chip { padding: 10px 18px; font-size: 13.5px; }

.range-row { margin-top: 6px; }
.range-val { font-family: var(--mono); font-size: 20px; font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
input[type="range"] { width: 100%; height: 6px; appearance: none; -webkit-appearance: none; margin-top: 16px; border-radius: 999px; background: linear-gradient(90deg, var(--brand-a), var(--brand-b)) no-repeat, rgba(255,255,255,.08); background-size: var(--fill, 50%) 100%; outline: none; cursor: pointer; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 999px; background: #fff; border: 4px solid var(--brand-a); box-shadow: 0 0 16px rgba(124, 92, 255, .55); transition: transform .2s var(--ease); cursor: grab; }
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.18); }

.brief-nav { display: flex; justify-content: space-between; margin-top: 32px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.f-field label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 700; color: var(--t2); }
.f-field input, .f-field textarea {
  width: 100%; padding: 13px 15px;
  border-radius: var(--r-input); border: 1px solid var(--line);
  background: rgba(6, 8, 16, .55); color: var(--t1);
  font-size: 14px; outline: none; font-family: var(--font);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.f-field input:focus, .f-field textarea:focus { border-color: rgba(124, 92, 255, .6); box-shadow: 0 0 0 3px rgba(124, 92, 255, .14); }
.f-field input::placeholder, .f-field textarea::placeholder { color: var(--t3); }
.f-err { margin-top: 6px; font-size: 12px; color: var(--err); display: none; }
.f-err.show { display: block; }
.agree-row { display: flex; align-items: flex-start; gap: 9px; margin-top: 18px; font-size: 12.5px; color: var(--t2); cursor: pointer; }
.agree-row input { margin-top: 2px; width: 15px; height: 15px; accent-color: var(--brand-a); }

/* 需求单预览 */
.preview-card { position: sticky; top: 92px; padding: 24px; }
.preview-card h4 { display: flex; align-items: center; gap: 8px; font-size: 15px; }
.preview-card h4 i { width: 8px; height: 8px; border-radius: 999px; background: var(--ok); box-shadow: 0 0 10px var(--ok); font-style: normal; }
.pv-row { display: flex; justify-content: space-between; gap: 14px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 13px; }
.pv-row span { color: var(--t3); flex: none; }
.pv-row b { text-align: right; font-weight: 700; color: var(--t1); transition: color .2s; }
.pv-row b.flash { animation: pv-flash .6s var(--ease); }
@keyframes pv-flash { 0% { color: var(--brand-b); } 100% { color: var(--t1); } }
.pv-note { margin-top: 16px; padding: 12px 14px; border-radius: 12px; background: rgba(34, 211, 238, .06); border: 1px solid rgba(34, 211, 238, .2); font-size: 12px; color: var(--t2); line-height: 1.7; }

/* 成功页 */
.success-panel { text-align: center; padding: 40px 20px; display: none; }
.success-panel.show { display: block; }
.check-ring { width: 96px; height: 96px; margin: 0 auto; }
.check-ring circle { fill: none; stroke: url(#gradGrad); stroke-width: 3; stroke-dasharray: 283; stroke-dashoffset: 283; animation: draw 1s var(--ease) forwards; }
.check-ring path { fill: none; stroke: var(--ok); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 60; stroke-dashoffset: 60; animation: draw .6s var(--ease) .7s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.success-panel h3 { margin-top: 24px; font-size: 24px; }
.success-panel p { margin: 12px auto 0; max-width: 420px; color: var(--t2); font-size: 14px; }
.success-panel .hero-cta { margin-top: 26px; }

/* ============ 案例墙 ============ */
.case-lg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* ============ 案例详情 ============ */
.cd-hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: stretch; }
.cd-cover { border-radius: var(--r-card); display: grid; place-items: center; min-height: 280px; position: relative; overflow: hidden; border: 1px solid var(--line); }
.cd-cover b { font-family: var(--mono); font-size: 52px; color: rgba(255, 255, 255, .9); text-shadow: 0 8px 40px rgba(0, 0, 0, .45); }
.cd-cover::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 75% 15%, rgba(255, 255, 255, .2), transparent 50%); }
.cd-info { display: flex; flex-direction: column; justify-content: center; padding: 8px 4px; }
.cd-info h1 { font-size: 34px; letter-spacing: -.6px; line-height: 1.25; margin-top: 16px; }
.cd-info > p { margin-top: 14px; color: var(--t2); font-size: 15px; }
.cd-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 26px; }
.cd-metrics div { padding: 16px 18px; border-radius: 14px; border: 1px solid var(--line); background: var(--card); }
.cd-metrics b { display: block; font-family: var(--mono); font-size: 24px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cd-metrics span { font-size: 11.5px; color: var(--t3); }
.cd-section { padding: 26px 28px; margin-top: 20px; }
.cd-section h3 { display: flex; align-items: center; gap: 10px; font-size: 18px; }
.cd-section h3 .icard { width: 36px; height: 36px; border-radius: 10px; }
.cd-section h3 .icard svg { width: 17px; height: 17px; }
.cd-section p { margin-top: 12px; font-size: 14.5px; line-height: 1.9; color: var(--t2); }
.cd-dialog { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }
.cd-dialog .msg { max-width: 92%; }

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .hero h1 { font-size: 44px; }
  .cap-grid, .case-grid, .ag-grid, .case-lg-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr 1fr; gap: 36px; }
  .flow::before { display: none; }
  .exp-layout { grid-template-columns: 1fr; }
  .exp-side { position: static; max-height: 260px; }
  .brief-layout { grid-template-columns: 1fr; }
  .preview-card { position: static; }
  .cd-hero { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 34px; letter-spacing: -.5px; }
  .cap-grid, .case-grid, .ag-grid, .case-lg-grid, .scene-grid, .form-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .steps span { display: none; }
  .exp-main { min-height: 70vh; }
}


/* ============ 学习中心 ============ */
.member-hero {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 30px 34px;
  border-radius: 24px;
  border: 1px solid rgba(124, 92, 255, .3);
  background:
    radial-gradient(circle at 88% -20%, rgba(34, 211, 238, .18), transparent 45%),
    linear-gradient(135deg, rgba(124, 92, 255, .16), rgba(124, 92, 255, .04));
  margin-bottom: 36px;
  position: relative; overflow: hidden;
}
.member-hero-copy .kicker { margin-bottom: 0; }
.member-hero-copy h2 { margin-top: 12px; font-size: 28px; letter-spacing: -.5px; }
.member-hero-copy p { margin-top: 10px; font-size: 14px; color: var(--t2); max-width: 520px; }
.member-perks { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.member-perks span { padding: 6px 13px; border-radius: 999px; border: 1px solid rgba(124, 92, 255, .3); background: rgba(6, 8, 16, .4); font-size: 12px; color: var(--t2); }
.member-hero .vip-art { font-size: 92px; line-height: 1; filter: drop-shadow(0 12px 40px rgba(124, 92, 255, .45)); transition: transform .4s var(--ease); }
.member-hero:hover .vip-art { transform: scale(1.08) rotate(-6deg); }

.learn-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.learn-card { overflow: hidden; cursor: pointer; display: flex; flex-direction: column; }
.learn-cover { height: 128px; position: relative; display: grid; place-items: center; }
.learn-cover b { position: relative; font-size: 40px; filter: drop-shadow(0 8px 22px rgba(0,0,0,.4)); transition: transform .35s var(--ease); }
.learn-card:hover .learn-cover b { transform: scale(1.15) rotate(-5deg); }
.learn-cover .lock {
  position: absolute; right: 12px; top: 12px;
  width: 30px; height: 30px; border-radius: 999px;
  display: grid; place-items: center; font-size: 13px;
  background: rgba(6, 8, 16, .55); border: 1px solid rgba(251, 191, 36, .5);
}
.learn-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.learn-body h3 { font-size: 16.5px; line-height: 1.45; }
.learn-body p { margin-top: 8px; font-size: 12.5px; color: var(--t2); line-height: 1.7; flex: 1; }
.learn-meta { display: flex; align-items: center; gap: 14px; margin-top: 14px; padding-top: 13px; border-top: 1px dashed var(--line); font-size: 12px; color: var(--t3); }
.learn-meta b { color: var(--brand-b); font-family: var(--mono); font-weight: 700; }
.tag-gold { background: rgba(251, 191, 36, .1); border-color: rgba(251, 191, 36, .35); color: var(--warn); }

.lesson-list { margin-top: 6px; }
.lesson-row {
  display: flex; align-items: center; gap: 13px;
  padding: 13px 12px; border-radius: 12px;
  transition: background .2s;
}
.lesson-row:hover { background: rgba(124, 92, 255, .06); }
.lesson-row i {
  width: 28px; height: 28px; border-radius: 999px;
  display: grid; place-items: center;
  border: 1px solid rgba(124, 92, 255, .3); background: rgba(124, 92, 255, .08);
  color: var(--brand-b); font-style: normal; font-size: 11px; font-weight: 800; font-family: var(--mono);
  flex: none;
}
.lesson-row b { flex: 1; min-width: 0; font-size: 13.5px; font-weight: 600; color: var(--t1); }
.lesson-row span { font-size: 11.5px; color: var(--t3); flex: none; }

@media (max-width: 1020px) { .learn-grid { grid-template-columns: 1fr 1fr; } .member-hero { flex-direction: column; text-align: center; } .member-perks { justify-content: center; } }
@media (max-width: 640px) { .learn-grid { grid-template-columns: 1fr; } }

/* ============ Vidu 实时数字人面板 ============ */
.live-panel { padding: 16px; border-bottom: 1px solid var(--line); background: rgba(6, 8, 16, .45); }
.live-stage {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: #04060c;
  aspect-ratio: 16 / 9;
  max-height: 320px;
  border: 1px solid rgba(99, 102, 241, .35);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, .12), 0 14px 40px rgba(0, 0, 0, .45);
}
.live-stage video { width: 100%; height: 100%; object-fit: cover; display: block; background: #04060c; }
.live-stage .live-placeholder {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  color: var(--t3); font-size: 13px; text-align: center; padding: 20px;
}
.live-stage .live-placeholder .big { font-size: 44px; filter: drop-shadow(0 8px 26px rgba(99, 102, 241, .5)); }
.live-badge {
  position: absolute; top: 10px; left: 10px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: 999px;
  background: rgba(4, 6, 12, .72); border: 1px solid var(--line-2);
  font-size: 11px; font-weight: 800; color: var(--t2);
  backdrop-filter: blur(8px);
}
.live-badge i { width: 7px; height: 7px; border-radius: 999px; background: var(--t3); font-style: normal; }
.live-badge.is-on { border-color: rgba(52, 211, 153, .5); color: var(--ok); }
.live-badge.is-on i { background: var(--ok); box-shadow: 0 0 10px var(--ok); animation: live-pulse 1.6s infinite; }
.live-badge.is-speaking { border-color: rgba(34, 211, 238, .55); color: var(--brand-b); }
.live-badge.is-speaking i { background: var(--brand-b); box-shadow: 0 0 10px var(--brand-b); animation: live-pulse .8s infinite; }
@keyframes live-pulse { 50% { opacity: .45; } }

.live-controls {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  margin-top: 12px;
}
.live-controls .btn { height: 40px; padding: 0 18px; font-size: 13.5px; }
.live-type { margin-left: auto; display: inline-flex; padding: 4px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); }
.live-type button {
  height: 32px; padding: 0 14px; border: 0; border-radius: 999px;
  background: transparent; color: var(--t2); font-size: 12px; font-weight: 800; cursor: pointer;
  transition: all .25s var(--ease);
}
.live-type button:hover { color: var(--t1); }
.live-type button.is-on { background: var(--grad); color: #fff; box-shadow: 0 4px 14px rgba(124, 92, 255, .3); }
.live-err { margin-top: 10px; padding: 10px 14px; border-radius: 10px; border: 1px solid rgba(248, 113, 113, .35); background: rgba(248, 113, 113, .07); color: #fda4af; font-size: 12.5px; display: none; }
.live-err.show { display: block; }
.live-console-link { font-size: 12px; color: var(--t3); }
.live-console-link a { color: var(--brand-b); text-decoration: none; font-weight: 700; }
.live-console-link a:hover { text-decoration: underline; }