:root {
  --bg: #08090c;
  --card: #14161c;
  --card-2: #1a1d25;
  --ink: #f3f5f8;
  --ink-2: #c4c9d2;
  --muted: #7e8593;
  --line: rgba(255,255,255,0.09);
  --line-strong: rgba(255,255,255,0.16);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,0.5), 0 14px 44px rgba(0,0,0,0.55);
  /* 结论语义色：高危红 / 不确定黄 / 没问题绿 */
  --red: #ff4d4f;
  --yellow: #f5b60a;
  --green: #2fd07a;
  /* 严格黑白：装饰色只用白/灰 */
  --accent: #ffffff;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html { -webkit-text-size-adjust: 100%; background: var(--bg); }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: transparent;
  color: var(--ink);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== 背景：循环电子扫描动效（法眼感，肉眼明显）===== */
.scan-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: radial-gradient(125% 95% at 50% 16%, #0e1118 0%, #05060a 72%);
  pointer-events: none;
}
/* 静态雷达环：外框 */
.scan-ring {
  position: absolute;
  left: 50%; top: 50%;
  width: 118vmin; height: 118vmin;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04),
              inset 0 0 150px rgba(255,255,255,0.05);
}
/* 同心圆环 + 放射十字线（参考雷达屏细节，白色系） */
.scan-crosshairs {
  position: absolute;
  left: 50%; top: 50%;
  width: 118vmin; height: 118vmin;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background:
    /* 放射十字线：每 30° 一条 */
    repeating-conic-gradient(from 0deg,
      rgba(255,255,255,0.00) 0deg 0deg,
      rgba(255,255,255,0.07) 0.6deg 0.6deg,
      rgba(255,255,255,0.00) 1.2deg 30deg),
    /* 同心圆环 */
    repeating-radial-gradient(circle,
      rgba(255,255,255,0.00) 0px,
      rgba(255,255,255,0.00) calc(10% - 1px),
      rgba(255,255,255,0.10) 10%,
      rgba(255,255,255,0.00) calc(10% + 1px),
      rgba(255,255,255,0.00) 20%);
  -webkit-mask-image: radial-gradient(circle, #000 0%, #000 58%, transparent 60%);
  mask-image: radial-gradient(circle, #000 0%, #000 58%, transparent 60%);
  opacity: 0.9;
}
/* 旋转扫描光束：锐利前缘 + 短拖尾，整圈循环 */
.scan-radar {
  position: absolute;
  left: 50%; top: 50%;
  width: 118vmin; height: 118vmin;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: conic-gradient(from 0deg,
    rgba(255,255,255,0.00) 0deg,
    rgba(255,255,255,0.00) 308deg,
    rgba(255,255,255,0.12) 350deg,
    rgba(255,255,255,0.62) 358.5deg,
    rgba(255,255,255,0.00) 360deg);
  -webkit-mask-image: radial-gradient(circle, #000 0%, #000 58%, transparent 60%);
  mask-image: radial-gradient(circle, #000 0%, #000 58%, transparent 60%);
  opacity: 0.85;
  animation: scanSpin 8s linear infinite;
  will-change: transform;
}
/* 雷达中心点：微脉冲 */
.scan-center {
  position: absolute;
  left: 50%; top: 50%;
  width: 10px; height: 10px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 0 2px rgba(255,255,255,0.25),
              0 0 20px rgba(255,255,255,0.35);
  animation: centerPulse 3s ease-in-out infinite;
  will-change: transform, opacity;
}
/* 横向扫描光束：自上而下循环扫过 */
.scan-line {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
  box-shadow: 0 0 24px rgba(255,255,255,0.55);
  animation: scanSweep 7s cubic-bezier(.45,0,.55,1) infinite;
  will-change: transform, opacity;
}
/* 扫描网格：向中心淡出 */
.scan-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 75%);
  mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 75%);
}
/* 暗角，聚焦中心（弱化，保证扫描光束可见） */
.scan-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, transparent 0%, rgba(0,0,0,0.5) 95%);
}
@keyframes scanSpin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to   { transform: translate(-50%, -50%) rotate(360deg); }
}
@keyframes scanSweep {
  0%   { transform: translateY(-12px); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateY(100vh); opacity: 0; }
}
@keyframes centerPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.9; }
  50%      { transform: translate(-50%, -50%) scale(1.35); opacity: 0.45; }
}

.app {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 18px 64px;
  position: relative;
}

/* ===== topbar ===== */
.topbar {
  max-width: 600px;
  margin: 0 auto;
  padding: 18px 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar .brand {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 9px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 17px; font-weight: 600; letter-spacing: 0.06em; color: var(--ink); }
.brand-sub { font-size: 11px; color: var(--muted); letter-spacing: 0.02em; }
.hero .brand-sub { font-size: 14px; color: var(--ink-2); letter-spacing: 0.08em; margin-top: 8px; }
.logo {
  width: 24px; height: 24px;
  color: var(--accent);
  flex: 0 0 auto;
}
.logo .sweep {
  transform-origin: 24px 24px;
  animation: scanSpin 6s linear infinite;
}
.auth-area { display: flex; align-items: center; gap: 10px; }
.mem-badge {
  font-size: 12px;
  color: var(--green);
  background: rgba(47,208,122,0.12);
  border-radius: 999px;
  padding: 3px 10px;
}
.user-email { font-size: 13px; color: var(--muted); max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ===== hero ===== */
.hero { text-align: center; padding: 42px 0 26px; }
.hero h1 {
  font-size: 31px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.hero .sub {
  color: var(--ink-2);
  font-size: 14px;
  margin-top: 12px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}
.hero .sub b { color: var(--accent); font-weight: 600; }

/* ===== card / field ===== */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-top: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(2px);
}

.field { display: block; margin-bottom: 16px; }
.field:last-of-type { margin-bottom: 0; }
.img-preview { margin-top: 10px; }
.img-preview img {
  max-width: 100%;
  max-height: 240px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  display: block;
}
.field > span {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

select, textarea, .auth-panel input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  font-size: 15px;
  font-family: inherit;
  background: var(--bg);
  color: var(--ink);
  resize: vertical;
  transition: border-color .15s ease, background .15s ease;
}
select:focus, textarea:focus, .auth-panel input:focus {
  outline: none;
  border-color: var(--accent);
  background: #0c0e13;
}

.btn {
  width: 100%;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #08090c;
  font-size: 16px;
  font-weight: 700;
  padding: 14px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: opacity .15s ease, transform .05s ease;
}
.btn:active { transform: scale(0.99); opacity: 0.9; }
.btn:disabled { opacity: 0.45; cursor: default; }

.btn-link {
  border: none;
  background: none;
  color: var(--ink-2);
  font-size: 14px;
  cursor: pointer;
  padding: 4px 2px;
}
.btn-link:hover { color: var(--ink); }

.hint { font-size: 12.5px; color: var(--muted); margin-top: 12px; text-align: center; }

/* ===== result: verdict hero ===== */
.result-card { padding: 0; overflow: hidden; }
.verdict-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 22px;
  border-bottom: 1px solid var(--line);
}
.verdict-hero.v-red { background: linear-gradient(180deg, rgba(255,77,79,0.16), rgba(255,77,79,0.04)); }
.verdict-hero.v-yellow { background: linear-gradient(180deg, rgba(245,182,10,0.16), rgba(245,182,10,0.04)); }
.verdict-hero.v-green { background: linear-gradient(180deg, rgba(47,208,122,0.16), rgba(47,208,122,0.04)); }
.verdict-hero.v-gray { background: linear-gradient(180deg, rgba(150,160,190,0.16), rgba(150,160,190,0.04)); }
.v-gray .vh-dot { background: var(--muted); color: var(--muted); }
.v-gray .vh-label { color: var(--ink); }
.v-gray .vh-score-num { color: var(--muted); }
.v-gray .vh-bar > span { background: var(--muted); }

/* ===== 匿名反馈 / 申请复核 ===== */
.consent-row { display: flex; gap: 8px; align-items: center; margin-top: 12px;
  font-size: 13px; color: var(--muted); cursor: pointer; }
.consent-row input { width: 16px; height: 16px; accent-color: var(--accent); }
.feedback-box { border-top: 1px dashed var(--line); padding-top: 16px; margin-top: 4px; }
.feedback-box h4 { margin: 0 0 10px; font-size: 14px; color: var(--ink); }
.fb-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.fb-btn { border: 1px solid var(--line); background: var(--card-2, #141a2c); color: var(--ink);
  border-radius: 8px; padding: 6px 12px; font-size: 13px; cursor: pointer; transition: .15s; }
.fb-btn:hover { border-color: var(--accent); color: #fff; }
.fb-btn.review { border-color: rgba(150,160,190,0.5); }

.vh-main { display: flex; align-items: center; gap: 14px; min-width: 0; }
.vh-dot { width: 14px; height: 14px; border-radius: 50%; flex: 0 0 auto; box-shadow: 0 0 12px currentColor; }
.v-red .vh-dot { background: var(--red); color: var(--red); }
.v-yellow .vh-dot { background: var(--yellow); color: var(--yellow); }
.v-green .vh-dot { background: var(--green); color: var(--green); }
.vh-label { font-size: 24px; font-weight: 700; line-height: 1.2; }
.v-red .vh-label { color: var(--red); }
.v-yellow .vh-label { color: var(--yellow); }
.v-green .vh-label { color: var(--green); }
.vh-summary { font-size: 14px; color: var(--ink-2); margin-top: 6px; }

.vh-score { text-align: center; flex: 0 0 auto; padding-left: 16px; border-left: 1px solid var(--line); }
.vh-score-num { font-size: 30px; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.v-red .vh-score-num { color: var(--red); }
.v-yellow .vh-score-num { color: var(--yellow); }
.v-green .vh-score-num { color: var(--green); }
.vh-score-cap { font-size: 11px; color: var(--muted); letter-spacing: 0.08em; margin-top: 2px; }
.vh-bar { width: 64px; height: 4px; border-radius: 999px; background: rgba(255,255,255,0.12); margin: 8px auto 0; overflow: hidden; }
.vh-bar > span { display: block; height: 100%; border-radius: 999px; }
.v-red .vh-bar > span { background: var(--red); }
.v-yellow .vh-bar > span { background: var(--yellow); }
.v-green .vh-bar > span { background: var(--green); }

/* ===== result: sections ===== */
.result-body { padding: 22px; }
.sec { margin-bottom: 20px; }
.sec:last-child { margin-bottom: 0; }
.sec h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.sec ul { padding-left: 18px; }
.sec li { font-size: 14.5px; margin-bottom: 6px; color: var(--ink-2); }
.sec p { font-size: 14.5px; color: var(--ink-2); }

.action-box {
  background: var(--card-2);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-bottom: 20px;
}
.action-box h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}
.action-box p { font-size: 14.5px; color: var(--ink); }

.sources {
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 14px;
  line-height: 1.6;
}

/* ===== video meta block ===== */
.block.vmeta {
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-bottom: 20px;
}
.block.vmeta h3 { font-size: 12px; font-weight: 600; color: var(--muted); letter-spacing: 0.06em; margin-bottom: 8px; }
.block.vmeta p { font-size: 13.5px; color: var(--ink-2); margin-bottom: 4px; }
.block.vmeta .warn { color: var(--red); background: rgba(255,77,79,0.12); border-radius: 8px; padding: 8px 10px; margin-top: 8px; }

/* ===== footer ===== */
.foot { text-align: center; color: var(--muted); font-size: 12px; margin-top: 28px; line-height: 1.7; }

/* ===== auth modal ===== */
.modal { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal-mask { position: absolute; inset: 0; background: rgba(0,0,0,0.6); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); cursor: pointer; }
.modal-card {
  position: relative;
  width: min(420px, 92vw);
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 26px 24px;
  box-shadow: 0 24px 70px rgba(0,0,0,0.6);
}
.modal-card h2 { font-size: 20px; margin-bottom: 6px; letter-spacing: 0.02em; }
.modal-sub { font-size: 12.5px; color: var(--muted); margin-bottom: 18px; line-height: 1.6; }
.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 30px; height: 30px; border: none; background: transparent;
  font-size: 18px; line-height: 1; color: var(--muted); cursor: pointer;
  border-radius: 8px;
}
.modal-close:hover { background: rgba(255,255,255,0.08); color: var(--ink); }
.tabs { display: flex; gap: 8px; margin-bottom: 18px; }
.tab {
  flex: 1;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 14px;
  cursor: pointer;
  color: var(--muted);
  transition: all .15s ease;
}
.tab.active { border-color: var(--accent); color: #08090c; font-weight: 600; background: var(--accent); }
.auth-panel .field > span { font-size: 13px; color: var(--muted); display: block; margin-bottom: 8px; }
.code-row { display: flex; gap: 8px; }
.code-row input { flex: 1; }
.btn-code {
  flex: 0 0 auto;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font-size: 13px;
  white-space: nowrap;
  cursor: pointer;
}
.btn-code:disabled { opacity: 0.5; cursor: default; }
.modal-card .btn { margin-top: 14px; }
.modal-card .btn-link { margin-top: 12px; display: block; text-align: center; }
.btn-link.danger { color: var(--red); }
.warn { color: var(--red); font-size: 12.5px; min-height: 16px; margin: 8px 0 0; }

/* ===== memory panel ===== */
.memory-card .mem-head { display: flex; align-items: center; justify-content: space-between; }
.memory-card .mem-head h3 { font-size: 16px; }
.mem-list { list-style: none; margin-top: 12px; }
.mem-list li {
  font-size: 13.5px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--card-2);
}
.mem-time { color: var(--muted); font-variant-numeric: tabular-nums; }

/* ===== 维度标签 / 已辟谣库 / 适老化 卡片 ===== */
.dim-box .dim-row { display: flex; align-items: baseline; gap: 8px; margin: 6px 0; flex-wrap: wrap; }
.dim-box .dim-label { color: var(--muted); font-size: 13px; flex: 0 0 40px; }
.dim-box .dim-chip {
  display: inline-block;
  font-size: 12.5px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--card-2);
  border: 1px solid var(--line-strong);
  color: var(--ink-2);
  margin: 2px 0;
}
.rumor-box { border-color: rgba(47,208,122,0.4); }
.rumor-box ul { list-style: none; margin-top: 8px; }
.rumor-box li { font-size: 13.5px; padding: 8px 0; border-bottom: 1px dashed var(--line); }
.rumor-box li:last-child { border-bottom: none; }
.rumor-box a { color: var(--ink); text-decoration: underline; }
.elderly-box { border-color: rgba(245,182,10,0.45); background: rgba(245,182,10,0.06); }
.elderly-box ul { list-style: none; margin-top: 8px; }
.elderly-box li { font-size: 14px; padding: 8px 0; border-bottom: 1px dashed var(--line); color: var(--ink); }
.elderly-box li:last-child { border-bottom: none; }

.hidden { display: none !important; }

@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
  .verdict-hero { flex-direction: column; align-items: flex-start; gap: 16px; }
  .vh-score { border-left: none; border-top: 1px solid var(--line); padding-left: 0; padding-top: 14px; width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; }
  .vh-bar { margin: 0 0 0 12px; }
}

/* 背景为品牌核心循环动效，依用户要求始终播放（不受系统「减少动态」影响）。
   若日后需要无障碍降级，可在此重新加回 .scan-line { opacity: 0 } 等规则。 */
@media (prefers-reduced-motion: reduce) {
  .logo .sweep { animation: none; }
}