/* ===========================================================
   AcupointAI · 穴位识别按揉指导 Web
   设计基调：中医宣纸米白 + 艾草青绿 + 朱砂红（穴位点）
   移动端优先，最小宽度 320px
   =========================================================== */

:root {
  --c-bg:        #F5F1E8;
  --c-bg-alt:    #EDE7D9;
  --c-surface:   #FFFFFF;
  --c-surface-2: #FBF8F1;
  --c-primary:   #1F6F5C;
  --c-primary-d: #155043;
  --c-primary-l: #E3EFEA;
  --c-accent:    #C0392B;
  --c-accent-l:  #F7E3E0;
  --c-gold:      #B08A3E;
  --c-ink:       #2B2B2B;
  --c-ink-2:     #55534E;
  --c-ink-3:     #6E6A61;   /* 已按 WCAG AA 4.5:1 校正，勿再调浅 */
  --c-border:    #DED6C4;
  --c-border-2:  #EDE6D6;
  --c-warn:      #C0392B;
  --c-ok:        #1F6F5C;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-pill: 999px;

  --sh-1: 0 1px 2px rgba(43,43,43,.06), 0 2px 8px rgba(43,43,43,.05);
  --sh-2: 0 4px 16px rgba(43,43,43,.10), 0 1px 3px rgba(43,43,43,.06);

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC",
          "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, serif;

  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: none;
}

body { min-height: 100dvh; }

a { color: var(--c-primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }

/* ---------- 通用 ---------- */
.wrap { max-width: 560px; margin: 0 auto; padding: 0 16px; }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.icon { width: 24px; height: 24px; display: block; }
.icon-sm { width: 18px; height: 18px; }
.icon-lg { width: 32px; height: 32px; }

/* ---------- 首页 ---------- */
.home-hero {
  position: relative;
  padding: calc(36px + var(--safe-t)) 16px 28px;
  background:
    radial-gradient(120% 80% at 50% 0%, #E9F1ED 0%, rgba(233,241,237,0) 62%),
    linear-gradient(180deg, #F7F4EC 0%, var(--c-bg) 100%);
  overflow: hidden;
}
.home-hero::after {
  content: "";
  position: absolute; inset: auto -20% -60% -20%; height: 200px;
  background: radial-gradient(50% 100% at 50% 0%, rgba(31,111,92,.10), transparent 70%);
  pointer-events: none;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  max-width: 560px; margin: 0 auto 18px;
}
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(145deg, var(--c-primary), var(--c-primary-d));
  display: grid; place-items: center; color: #fff; flex: none;
  box-shadow: var(--sh-1);
}
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
.brand-sub { font-size: 11px; color: var(--c-ink-3); letter-spacing: 1.6px; text-transform: uppercase; }

.home-title {
  max-width: 560px; margin: 0 auto 8px;
  font-family: var(--font-serif);
  font-size: 30px; line-height: 1.28; font-weight: 700; letter-spacing: 1px;
}
.home-title em { font-style: normal; color: var(--c-primary); }
.home-desc {
  max-width: 560px; margin: 0 auto 26px;
  color: var(--c-ink-2); font-size: 14.5px;
}

.section-label {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--c-ink-2);
  letter-spacing: 1px; margin: 0 0 12px;
}
.section-label::before {
  content: ""; width: 3px; height: 14px; border-radius: 2px;
  background: var(--c-primary);
}

.part-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  margin-bottom: 30px;
}
.part-card {
  position: relative;
  display: flex; flex-direction: column; gap: 10px;
  padding: 18px 16px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border-2);
  border-radius: var(--r-md);
  box-shadow: var(--sh-1);
  text-align: left;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.part-card:active { transform: scale(.975); }
@media (hover: hover) {
  .part-card:hover {
    border-color: var(--c-primary);
    box-shadow: var(--sh-2);
    transform: translateY(-2px);
  }
}
.part-card .pc-ico {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--c-primary-l); color: var(--c-primary);
  display: grid; place-items: center;
}
.part-card .pc-name { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
.part-card .pc-desc { font-size: 12px; color: var(--c-ink-3); line-height: 1.45; }
.part-card .pc-count {
  position: absolute; top: 14px; right: 14px;
  font-size: 11px; color: var(--c-primary);
  background: var(--c-primary-l); border-radius: var(--r-pill);
  padding: 2px 9px; font-weight: 600;
}

.feature-list { display: grid; gap: 10px; margin-bottom: 28px; }
.feature-item {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 13px 14px; background: var(--c-surface-2);
  border: 1px solid var(--c-border-2); border-radius: var(--r-md);
}
.feature-item .fi-ico { color: var(--c-primary); flex: none; margin-top: 1px; }
.feature-item .fi-t { font-size: 14px; font-weight: 600; }
.feature-item .fi-d { font-size: 12.5px; color: var(--c-ink-3); line-height: 1.5; }

.home-foot {
  padding: 20px 16px calc(28px + var(--safe-b));
  text-align: center; color: var(--c-ink-3); font-size: 11.5px; line-height: 1.8;
}

/* ---------- 免责声明弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 900;
  background: rgba(28,26,22,.55);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
  display: flex; align-items: flex-end; justify-content: center;
  padding: 0; opacity: 0; pointer-events: none; transition: opacity .22s ease;
}
.modal-mask.show { opacity: 1; pointer-events: auto; }
@media (min-width: 600px) {
  .modal-mask { align-items: center; padding: 24px; }
}
.modal {
  width: 100%; max-width: 520px; max-height: 88dvh; overflow-y: auto;
  background: var(--c-surface);
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  padding: 24px 20px calc(22px + var(--safe-b));
  transform: translateY(18px); transition: transform .26s cubic-bezier(.22,.9,.28,1);
  box-shadow: 0 -8px 40px rgba(0,0,0,.22);
}
@media (min-width: 600px) {
  .modal { border-radius: var(--r-lg); padding-bottom: 24px; transform: scale(.97); }
  .modal-mask.show .modal { transform: scale(1); }
}
.modal-mask.show .modal { transform: translateY(0); }
.modal h2 {
  margin: 0 0 4px; font-size: 19px; font-family: var(--font-serif); letter-spacing: .5px;
}
.modal .m-sub { font-size: 12px; color: var(--c-ink-3); margin-bottom: 16px; }
.modal .m-body {
  font-size: 13.5px; color: var(--c-ink-2); line-height: 1.85;
  background: var(--c-surface-2); border: 1px solid var(--c-border-2);
  border-radius: var(--r-md); padding: 14px 15px; margin-bottom: 16px;
}
.modal .m-body ol { margin: 6px 0 0; padding-left: 18px; }
.modal .m-body li { margin-bottom: 7px; }
.modal .m-body strong { color: var(--c-warn); }
.modal .m-agree {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13px; color: var(--c-ink-2); margin-bottom: 16px; cursor: pointer;
}
.modal .m-agree input {
  width: 18px; height: 18px; margin: 2px 0 0; flex: none;
  accent-color: var(--c-primary);
}
.modal .m-actions { display: flex; gap: 10px; }

/* ---------- 按钮 ---------- */
.btn {
  appearance: none; border: 1px solid transparent;
  border-radius: var(--r-md); padding: 13px 18px;
  font-size: 15px; font-weight: 600; letter-spacing: .5px;
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  white-space: nowrap;
  transition: transform .14s ease, background .18s ease, opacity .18s ease;
}
.btn:active { transform: scale(.975); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:not(:disabled):hover { background: var(--c-primary-d); }
.btn-ghost { background: transparent; color: var(--c-ink-2); border-color: var(--c-border); }
.btn-ghost:not(:disabled):hover { background: var(--c-bg-alt); }
.btn-accent { background: var(--c-accent); color: #fff; }
.btn-block { width: 100%; }
.btn-lg { padding: 15px 22px; font-size: 16px; }

/* ---------- 识别主页面 ---------- */
.stage {
  position: fixed; inset: 0;
  background: #12100E;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.stage-topbar {
  position: absolute; top: 0; left: 0; right: 0; z-index: 30;
  padding: calc(8px + var(--safe-t)) 12px 10px;
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(180deg, rgba(12,11,9,.82), rgba(12,11,9,0));
  pointer-events: none;
}
.stage-topbar > * { pointer-events: auto; }
.tb-btn {
  width: 38px; height: 38px; flex: none; border-radius: 50%;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.16);
  color: #fff; display: grid; place-items: center;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: background .18s ease;
}
.tb-btn:hover { background: rgba(255,255,255,.26); }
.tb-title {
  flex: 1; min-width: 0; color: #fff; font-size: 14.5px; font-weight: 600;
  letter-spacing: .5px; text-shadow: 0 1px 6px rgba(0,0,0,.5);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tb-title small { display: block; font-size: 11px; font-weight: 400; opacity: .72; letter-spacing: 1px; }
.tb-chip {
  flex: none; display: inline-flex; align-items: center; gap: 5px;
  height: 30px; padding: 0 11px; border-radius: var(--r-pill);
  font-size: 11.5px; font-weight: 600; color: #fff;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.tb-chip .dot { width: 6px; height: 6px; border-radius: 50%; background: #7CD6A8; }
.tb-chip.busy .dot { background: #F2C14E; animation: pulse 1.1s infinite; }
.tb-chip.err .dot { background: #E9705F; }
.tb-chip.ok .dot { background: #6EE7A8; box-shadow: 0 0 0 3px rgba(110,231,168,.22); }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .28 } }

.viewport {
  position: relative; flex: 1; min-height: 0; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
#video, #overlay {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  transform-origin: center center;
}
#video { width: 100%; height: 100%; object-fit: cover; background: #000; }
#overlay { pointer-events: none; touch-action: none; }
#overlay.dragging-enabled { pointer-events: auto; }
#overlay .hot { pointer-events: auto; cursor: grab; }
#overlay .hot.grabbing { cursor: grabbing; }

.stage-hint {
  position: absolute; left: 50%; bottom: 132px; transform: translateX(-50%);
  z-index: 20; max-width: 86%; text-align: center;
  padding: 9px 15px; border-radius: var(--r-pill);
  background: rgba(12,11,9,.66); color: #F3EFE6; font-size: 12.5px;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.10);
  transition: opacity .3s ease; pointer-events: none;
}
.stage-hint.hidden { display: none; }

/* 底部面板 */
.panel {
  position: relative; z-index: 25;
  background: linear-gradient(180deg, rgba(245,241,232,.97), var(--c-bg) 40%);
  border-top: 1px solid var(--c-border);
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  padding: 10px 14px calc(12px + var(--safe-b));
  box-shadow: 0 -6px 26px rgba(0,0,0,.24);
  max-height: 62dvh; overflow-y: auto;
  transition: transform .26s cubic-bezier(.22,.9,.28,1);
}
.panel.collapsed { transform: translateY(calc(100% - 46px)); }
.panel-handle {
  width: 40px; height: 4px; border-radius: 2px; background: var(--c-border);
  margin: 2px auto 10px;
}
.panel-row1 {
  display: flex; align-items: center; gap: 12px; margin-bottom: 10px;
}
.acu-id {
  flex: 1; min-width: 0;
}
.acu-id .ai-name {
  font-family: var(--font-serif);
  font-size: 21px; font-weight: 700; letter-spacing: 1.5px; line-height: 1.2;
}
.acu-id .ai-name span {
  font-family: var(--font); font-size: 11px; font-weight: 500;
  color: var(--c-ink-3); letter-spacing: 1px; margin-left: 6px;
}
.acu-id .ai-meta {
  font-size: 12px; color: var(--c-ink-3); margin-top: 3px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.acu-id .ai-meta b { color: var(--c-primary); font-weight: 600; }

.count-ring {
  position: relative; flex: none; width: 62px; height: 62px;
}
.count-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.count-ring .cr-bg { fill: none; stroke: var(--c-border-2); stroke-width: 5; }
.count-ring .cr-fg {
  fill: none; stroke: var(--c-primary); stroke-width: 5; stroke-linecap: round;
  transition: stroke-dashoffset .28s linear, stroke .3s ease;
}
.count-ring .cr-num {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 16px; font-weight: 700; color: var(--c-primary);
  font-variant-numeric: tabular-nums;
}
.count-ring .cr-num small { font-size: 9px; color: var(--c-ink-3); display: block; text-align: center; font-weight: 500; }

.info-cards { display: grid; gap: 8px; margin-bottom: 10px; }
.info-card {
  background: var(--c-surface); border: 1px solid var(--c-border-2);
  border-radius: var(--r-md); padding: 10px 12px;
}
.info-card .ic-h {
  display: flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 700; color: var(--c-primary);
  letter-spacing: 1px; margin-bottom: 5px;
}
.info-card .ic-b { font-size: 13.5px; color: var(--c-ink); line-height: 1.65; }
.info-card .ic-b .sub { color: var(--c-ink-3); font-size: 12.5px; }
.info-card.warn { background: var(--c-accent-l); border-color: #EFCFC9; }
.info-card.warn .ic-h { color: var(--c-warn); }

.ctrl-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 10px;
}
/* 宽屏（平板/桌面）一排放下 4 个，把纵向空间留给摄像头画面 */
@media (min-width: 600px) {
  .ctrl-grid { grid-template-columns: repeat(4, 1fr); }
}
.ctrl-btn {
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  padding: 11px 6px; border-radius: var(--r-md);
  background: var(--c-surface); border: 1px solid var(--c-border-2);
  color: var(--c-ink-2); font-size: 11.5px; font-weight: 600;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.ctrl-btn:active { transform: scale(.97); }
.ctrl-btn.on {
  background: var(--c-primary-l); border-color: var(--c-primary);
  color: var(--c-primary-d);
}
.ctrl-btn.on .icon { color: var(--c-primary); }

.action-row { display: flex; gap: 9px; margin-bottom: 10px; }
.action-row .btn { flex: 1; }

.point-strip {
  display: flex; gap: 8px; overflow-x: auto; padding: 2px 0 8px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.point-strip::-webkit-scrollbar { display: none; }
.point-pill {
  flex: none; padding: 8px 14px; border-radius: var(--r-pill);
  background: var(--c-surface); border: 1px solid var(--c-border-2);
  font-size: 12.5px; font-weight: 600; color: var(--c-ink-2); white-space: nowrap;
  transition: background .16s ease, color .16s ease, border-color .16s ease;
}
.point-pill.active {
  background: var(--c-primary); border-color: var(--c-primary); color: #fff;
}
.point-pill.done {
  background: var(--c-primary-l); border-color: var(--c-primary-l);
  color: var(--c-primary-d); text-decoration: line-through; opacity: .8;
}

/* 校准块（放在底部面板内，不遮挡摄像头画面） */
.calib-block { padding: 2px 0 4px; }
.calib-block .cb-t { font-size: 15px; font-weight: 700; letter-spacing: .5px; margin-bottom: 4px; }
.calib-block .cb-d { font-size: 12.5px; color: var(--c-ink-2); line-height: 1.6; margin-bottom: 11px; }
.calib-acts { display: flex; gap: 9px; }
.calib-acts .btn { flex: 1; padding: 12px 14px; font-size: 14px; }

/* 加载遮罩 */
.loading-mask {
  position: fixed; inset: 0; z-index: 950;
  background: var(--c-bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; text-align: center; padding: 24px;
}
.spinner {
  width: 40px; height: 40px; border-radius: 50%;
  border: 3px solid var(--c-border); border-top-color: var(--c-primary);
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-mask .lm-t { font-size: 15px; font-weight: 600; }
.loading-mask .lm-d { font-size: 12.5px; color: var(--c-ink-3); max-width: 300px; line-height: 1.7; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: calc(90px + var(--safe-b));
  transform: translateX(-50%) translateY(8px);
  z-index: 990; max-width: 86vw;
  padding: 11px 17px; border-radius: var(--r-pill);
  background: rgba(24,22,19,.92); color: #F5F1E8;
  font-size: 13px; letter-spacing: .3px;
  opacity: 0; pointer-events: none; transition: opacity .22s ease, transform .22s ease;
  box-shadow: var(--sh-2);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 知识库抽屉 */
.sheet-mask {
  position: fixed; inset: 0; z-index: 920; background: rgba(28,26,22,.5);
  opacity: 0; pointer-events: none; transition: opacity .22s ease;
}
.sheet-mask.show { opacity: 1; pointer-events: auto; }
.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 930;
  max-height: 82dvh; overflow-y: auto;
  background: var(--c-surface); border-radius: var(--r-lg) var(--r-lg) 0 0;
  padding: 18px 16px calc(24px + var(--safe-b));
  transform: translateY(102%); transition: transform .28s cubic-bezier(.22,.9,.28,1);
  max-width: 560px; margin: 0 auto;
}
.sheet.show { transform: translateY(0); }
.sheet h3 {
  margin: 0 0 3px; font-size: 17px; font-family: var(--font-serif); letter-spacing: .5px;
}
.sheet .sh-sub { font-size: 12px; color: var(--c-ink-3); margin-bottom: 14px; }
.acu-list { display: grid; gap: 8px; }
.acu-row {
  display: flex; align-items: center; gap: 11px; width: 100%; text-align: left;
  padding: 11px 12px; border-radius: var(--r-md);
  background: var(--c-surface-2); border: 1px solid var(--c-border-2);
  transition: border-color .16s ease, background .16s ease;
}
.acu-row:hover { border-color: var(--c-primary); background: var(--c-primary-l); }
.acu-row .ar-badge {
  flex: none; width: 40px; height: 40px; border-radius: 10px;
  background: var(--c-primary); color: #fff; display: grid; place-items: center;
  font-size: 11px; font-weight: 700; letter-spacing: .5px; line-height: 1.1; text-align: center;
}
.acu-row .ar-main { flex: 1; min-width: 0; }
.acu-row .ar-n { font-size: 15px; font-weight: 700; }
.acu-row .ar-n span { font-size: 11px; font-weight: 500; color: var(--c-ink-3); margin-left: 6px; }
.acu-row .ar-m { font-size: 11.5px; color: var(--c-ink-3); }

/* 隐私/兼容提示页 */
.center-page {
  min-height: 100dvh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 14px; padding: 28px 22px;
  text-align: center;
}
.center-page .cp-ico {
  width: 64px; height: 64px; border-radius: 18px; background: var(--c-primary-l);
  color: var(--c-primary); display: grid; place-items: center;
}
.center-page h1 { font-size: 20px; margin: 0; font-family: var(--font-serif); }
.center-page p { margin: 0; font-size: 13.5px; color: var(--c-ink-2); max-width: 380px; line-height: 1.75; }

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* 小屏适配 */
@media (max-width: 360px) {
  .home-title { font-size: 25px; }
  .part-grid { gap: 10px; }
  .part-card { padding: 15px 13px 13px; }
  .acu-id .ai-name { font-size: 19px; }
  .count-ring { width: 56px; height: 56px; }
  .action-row { gap: 6px; }
  .action-row .btn { padding: 12px 8px; font-size: 13.5px; letter-spacing: 0; }
  .action-row .btn-lg { padding: 13px 10px; font-size: 14.5px; }
  .ctrl-grid { gap: 6px; }
  .ctrl-btn { padding: 10px 3px; font-size: 11px; }
}