/* 居家维修帮手 - 移动端优先样式 */
:root {
  --bg: #faf9f6;
  --card: #ffffff;
  --text: #2c2c2e;
  --text-sub: #6e6e73;
  --accent: #2a9d8f;
  --accent-dark: #21867a;
  --amber-bg: #fff8e6;
  --amber-border: #f0c545;
  --amber-text: #7a5c00;
  --red: #c94f4f;
  --red-bg: #fdeeee;
  --green: #3d8b5f;
  --border: #e8e5df;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --card: #2a2a2c;
    --text: #e8e8ea;
    --text-sub: #9a9aa0;
    --accent: #3fb3a5;
    --accent-dark: #35a093;
    --amber-bg: #3a3222;
    --amber-border: #8a7328;
    --amber-text: #e8d48a;
    --red: #e07a7a;
    --red-bg: #3a2626;
    --green: #6fc48f;
    --border: #3a3a3c;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 480px;
  margin: 0 auto;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 0 20px calc(8px + env(safe-area-inset-bottom));
  overflow: hidden;
}

/* 顶栏 */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 10px;
}
.topbar-title { font-size: 17px; font-weight: 600; letter-spacing: 0.5px; }
.icon-btn {
  background: none; border: none; color: var(--text-sub);
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  border-radius: 10px; cursor: pointer;
}
.icon-btn:active { background: var(--border); }

/* 屏幕 */
.screen { flex: 1; display: flex; flex-direction: column; padding-top: 12px; animation: fadein 0.25s ease; }
/* !important 必需：#screen-xxx 这类 id 选择器的 display:flex 特异性更高，会压过基类 */
.screen[hidden] { display: none !important; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.screen-title { font-size: 20px; margin-bottom: 14px; }

/* 首页 */
.hero { text-align: center; padding: 44px 8px 36px; }
.hero-icon {
  width: 76px; height: 76px; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--card); color: var(--accent);
  border-radius: 24px; border: 1px solid var(--border);
}
.hero h1 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.hero .sub { color: var(--text-sub); font-size: 15px; }

.actions { display: flex; flex-direction: column; gap: 12px; margin: 16px 0; }
.result-actions { margin-top: 20px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 20px;
  border-radius: var(--radius); border: 1.5px solid transparent;
  font-size: 16px; font-weight: 600; font-family: inherit;
  cursor: pointer; transition: opacity 0.15s, transform 0.05s;
}
.btn:active { transform: scale(0.985); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { background: var(--card); color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-lg { min-height: 54px; font-size: 17px; }
.btn-sm { min-height: 36px; padding: 6px 14px; font-size: 13px; border-radius: 8px; }

/* 折叠区 */
.fold, .settings {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); margin-top: 8px; overflow: hidden;
}
.fold summary, .settings summary {
  list-style: none; cursor: pointer;
  padding: 13px 16px; font-size: 14px; color: var(--text-sub);
  min-height: 44px; display: flex; align-items: center;
}
.fold summary::before, .settings summary::before {
  content: "›"; display: inline-block; margin-right: 8px;
  transform: rotate(90deg); transition: transform 0.2s; color: var(--text-sub);
}
.fold[open] summary::before, .settings[open] summary::before { transform: rotate(-90deg); }
.fold summary::-webkit-details-marker, .settings summary::-webkit-details-marker { display: none; }
.fold-body, .settings-body { padding: 4px 16px 16px; }
.fold-body textarea, .settings textarea { width: 100%; margin-bottom: 10px; }

/* 设置 */
.settings-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: 14px; }
.mode-badge {
  font-size: 12px; padding: 2px 10px; border-radius: 999px;
  background: var(--border); color: var(--text-sub);
}
.mode-badge.proxy { background: rgba(42, 157, 143, 0.14); color: var(--accent); }
.settings-key { margin-top: 10px; }
.settings-key label { display: block; font-size: 13px; color: var(--text-sub); margin-bottom: 6px; }
.settings-key input {
  width: 100%; min-height: 42px; padding: 8px 12px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--text); font-size: 14px; font-family: inherit;
}
.hint { font-size: 12px; color: var(--text-sub); margin-top: 8px; }

/* 预览页 */
.photo-wrap { position: relative; margin-bottom: 16px; }
.photo-wrap img {
  width: 100%; max-height: 46vh; object-fit: cover;
  border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--card);
}
.photo-remove {
  position: absolute; top: 10px; right: 10px;
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(0, 0, 0, 0.55); color: #fff;
  border: none; font-size: 20px; line-height: 1; cursor: pointer;
}
.field-label { font-size: 14px; color: var(--text-sub); margin-bottom: 6px; }
textarea {
  width: 100%; padding: 12px 14px; min-height: 84px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--card); color: var(--text);
  font-size: 15px; font-family: inherit; resize: vertical;
}
textarea:focus { outline: none; border-color: var(--accent); }

/* 诊断中 */
.loading { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px; padding: 60px 0; }
.spinner {
  width: 44px; height: 44px; border-radius: 50%;
  border: 3.5px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#loading-text { color: var(--text-sub); font-size: 15px; }

/* 结果页 */
.result-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.result-title { font-size: 20px; font-weight: 700; flex: 1; min-width: 200px; }
.sev-badge {
  font-size: 12px; font-weight: 600; padding: 3px 12px;
  border-radius: 999px; white-space: nowrap;
}
.sev-low { background: rgba(61, 139, 95, 0.14); color: var(--green); }
.sev-medium { background: rgba(240, 197, 69, 0.2); color: var(--amber-text); }
.sev-high { background: var(--red-bg); color: var(--red); }

.pro-banner {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--red-bg); color: var(--red);
  border: 1px solid var(--red); border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 12px; font-size: 15px; font-weight: 600;
}

.notice {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--amber-bg); border: 1px solid var(--amber-border);
  color: var(--amber-text); border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 18px; font-size: 14px;
}
.notice .warn-mark { font-weight: 800; }

.result-section { margin-bottom: 20px; }
.result-section h3 {
  font-size: 15px; color: var(--text-sub); font-weight: 600;
  margin-bottom: 10px; display: flex; align-items: center; gap: 6px;
}
.degrade-note { font-size: 13px; color: var(--text-sub); background: var(--card); border: 1px dashed var(--border); border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; }

.step-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px;
}
.step-head { display: flex; gap: 10px; align-items: baseline; }
.step-num {
  flex: none; width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: 13px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  transform: translateY(4px);
}
.step-title { font-size: 16px; font-weight: 600; }
.step-detail { margin-top: 6px; font-size: 14.5px; color: var(--text); }
.step-caution { margin-top: 8px; font-size: 13px; color: var(--text-sub); }
.step-caution::before { content: "注意 · "; font-weight: 600; }

.tool-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 13px; padding: 5px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border); color: var(--text);
}

/* 视频卡片 */
.video-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 10px;
}
.video-card-top {
  display: flex; gap: 12px; align-items: center;
  padding: 12px 14px; cursor: pointer; min-height: 64px;
}
.video-thumb {
  flex: none; width: 64px; height: 44px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; font-size: 12px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.video-thumb svg { width: 22px; height: 22px; }
.video-meta { flex: 1; min-width: 0; }
.video-title { font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.video-sub { font-size: 12.5px; color: var(--text-sub); display: flex; gap: 8px; align-items: center; }
.video-pending {
  font-size: 11px; color: var(--amber-text);
  background: var(--amber-bg); border: 1px solid var(--amber-border);
  border-radius: 6px; padding: 0 6px;
}
.video-play { margin: 0 0 10px 14px; width: calc(100% - 28px); border-radius: 10px; background: #000; max-height: 60vw; }
.video-card video { display: block; width: 100%; border-radius: 10px; }

.privacy {
  margin-top: auto; padding-top: 24px; text-align: center;
  font-size: 12px; color: var(--text-sub); opacity: 0.8;
}

/* 错误页 */
.error-box { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; padding: 40px 0; text-align: center; }
.error-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--amber-bg); border: 1.5px solid var(--amber-border);
  color: var(--amber-text); font-size: 26px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
#error-text { font-size: 15px; color: var(--text-sub); max-width: 300px; }
.error-box .actions { width: 100%; max-width: 280px; }

/* ============ 追问屏 ============ */
.clarify-thread { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.bubble {
  max-width: 82%; padding: 10px 14px; border-radius: 16px;
  font-size: 14.5px; line-height: 1.5; word-break: break-word;
}
.bubble-ai {
  align-self: flex-start;
  background: var(--card); border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.bubble-user {
  align-self: flex-end;
  background: rgba(42, 157, 143, 0.12); color: var(--accent-dark);
  border-bottom-right-radius: 4px;
}
@media (prefers-color-scheme: dark) {
  .bubble-user { color: var(--accent); }
}
.clarify-question-card {
  background: rgba(42, 157, 143, 0.08); border: 1px solid rgba(42, 157, 143, 0.35);
  border-radius: var(--radius); padding: 16px;
  font-size: 16px; font-weight: 600; margin-bottom: 8px;
}
.clarify-round-tip { font-size: 12.5px; color: var(--text-sub); margin-bottom: 8px; }

/* ============ 图片区 ============ */
.img-loading { font-size: 13px; color: var(--text-sub); }
.img-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.img-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; overflow: hidden; cursor: pointer; position: relative;
}
.img-card img {
  display: block; width: 100%; height: 86px; object-fit: cover; background: var(--border);
}
.img-cap {
  font-size: 11px; color: var(--text-sub); padding: 4px 6px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.img-fallback { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.img-fallback-note { width: 100%; font-size: 13px; color: var(--text-sub); margin: 0 0 4px; }
.img-fallback .btn { text-decoration: none; }

/* 设置：模型下拉 */
.provider-select {
  font-size: 13px; padding: 5px 10px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-family: inherit; max-width: 230px;
}

/* 视频入口按钮 */
.actions-video { margin-top: -4px; }
.btn-ghost {
  background: var(--card); color: var(--text-sub);
  border: 1.5px dashed var(--border); font-weight: 500;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-block { flex: 1; }

/* 预览：视频 */
.photo-wrap video {
  width: 100%; max-height: 46vh; border-radius: var(--radius);
  border: 1px solid var(--border); background: #000; object-fit: contain;
}

/* 追问：多问题列表 */
.clarify-q-item {
  display: flex; gap: 10px; align-items: flex-start;
  margin-bottom: 10px; line-height: 1.5;
}
.clarify-q-item:last-child { margin-bottom: 0; }
.clarify-q-num {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  transform: translateY(2px);
}

/* 结果：维修难度徽章 */
.diff-badge {
  font-size: 12px; font-weight: 600; padding: 3px 12px;
  border-radius: 999px; white-space: nowrap;
}
.diff-diy { background: rgba(61, 139, 95, 0.14); color: var(--green); }
.diff-watch { background: rgba(240, 197, 69, 0.2); color: var(--amber-text); }
.diff-pro { background: var(--red-bg); color: var(--red); }

/* 结果：注意事项列表 */
.prec-list { margin: 0; padding-left: 20px; }
.prec-list li { font-size: 14.5px; margin-bottom: 6px; color: var(--text); }

/* 结果：超出服务范围横幅 */
.scope-note {
  background: rgba(61, 139, 95, 0.12); color: var(--green);
  border: 1px solid rgba(61, 139, 95, 0.28);
  border-radius: 12px; padding: 12px 14px; font-size: 14px;
  margin-bottom: 14px; line-height: 1.6;
}

/* 追问屏：参考图 */
.clarify-images {
  display: flex; gap: 8px; overflow-x: auto; margin: 12px 0 4px;
  padding-bottom: 4px;
}
.clarify-img-card { flex: none; width: 88px; }
.clarify-img-card img {
  width: 88px; height: 66px; object-fit: cover; border-radius: 10px;
  border: 1px solid var(--border);
}

/* 结果：B站真实视频卡（点击嵌入 iframe 播放） */
.bili-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden; transition: border-color .15s;
}
.bili-card:hover { border-color: var(--accent); }
.bili-card-top {
  display: flex; gap: 12px; align-items: center; padding: 10px; cursor: pointer;
}
.bili-thumb { flex: none; width: 132px; height: 74px; border-radius: 8px; background: #000; overflow: hidden; }
.bili-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.bili-meta { min-width: 0; flex: 1; }
.bili-title {
  font-size: 14.5px; font-weight: 600; color: var(--text); line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.bili-sub { font-size: 12px; color: var(--text-sub); margin-top: 4px; }

/* ============ 聊天界面 ============ */
.chat {
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-top: 14px;
}
.chat-intro { text-align: center; padding: 44px 8px 28px; }
.intro-icon {
  width: 72px; height: 72px; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--card); color: var(--accent);
  border-radius: 24px; border: 1px solid var(--border);
}
.chat-intro h1 { font-size: 21px; font-weight: 700; margin-bottom: 8px; }
.chat-intro .sub { color: var(--text-sub); font-size: 14.5px; }
.intro-suggestions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 18px; }
.chip-suggest {
  font-size: 13px; padding: 7px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); cursor: pointer;
}
.chip-suggest:active { border-color: var(--accent); color: var(--accent); }

.chat-list { display: flex; flex-direction: column; gap: 14px; padding-bottom: 8px; }

.msg { display: flex; }
.msg-user { justify-content: flex-end; }
.msg-ai { justify-content: flex-start; }
.bubble {
  max-width: 90%;
  padding: 12px 14px;
  border-radius: 16px;
  font-size: 15px; line-height: 1.6;
  word-break: break-word;
}
.msg-user .bubble {
  background: var(--accent); color: #fff;
  border-bottom-right-radius: 4px;
}
.msg-ai .bubble {
  background: var(--card); border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.result-bubble { max-width: 96%; }
.msg-text { white-space: pre-wrap; }
.msg-media { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.msg-media img, .msg-media video {
  width: 120px; height: 120px; object-fit: cover;
  border-radius: 10px; background: #000;
}

/* 输入中（打字） */
.typing .bubble { display: flex; gap: 5px; align-items: center; padding: 14px 16px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-sub); opacity: .4; animation: blink 1.2s infinite; }
.dot:nth-child(2) { animation-delay: .2s; }
.dot:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .3; } 40% { opacity: 1; } }

/* 错误气泡 */
.bubble-error { background: var(--red-bg); color: var(--red); border-color: var(--red); }
.err-text { font-size: 14px; margin-bottom: 8px; }

/* 追问气泡 */
.clarify-q-hint { font-size: 14px; color: var(--text-sub); margin-bottom: 8px; }

/* 输入区（聊天框） */
.composer {
  flex: none;
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding-top: 8px;
}
.composer-attach { display: flex; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.attach-chip {
  position: relative; width: 56px; height: 56px;
  border-radius: 10px; overflow: hidden;
  border: 1px solid var(--border); background: var(--card);
}
.attach-chip img, .attach-chip video { width: 100%; height: 100%; object-fit: cover; }
.attach-chip-x {
  position: absolute; top: 2px; right: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: rgba(0, 0, 0, 0.6); color: #fff; border: none;
  font-size: 13px; line-height: 1; cursor: pointer;
}
.composer-row { display: flex; align-items: flex-end; gap: 8px; }
.composer-ico {
  flex: none; width: 40px; height: 40px; border-radius: 12px;
  border: 1.5px dashed var(--border); background: var(--card);
  color: var(--text-sub); font-size: 18px; cursor: pointer;
}
.composer-ico:active { transform: scale(0.96); }
#composer-input {
  flex: 1; resize: none; max-height: 120px; min-height: 40px;
  padding: 9px 12px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--card); color: var(--text);
  font-size: 15px; font-family: inherit; line-height: 1.4;
}
#composer-input:focus { outline: none; border-color: var(--accent); }
.composer-send {
  flex: none; height: 40px; padding: 0 18px; border-radius: 12px;
  border: none; background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 600; cursor: pointer;
}
.composer-send:active { transform: scale(0.97); }

/* ============ 师傅在线答疑 ============ */
.master-qa { background: rgba(42, 157, 143, 0.06); border: 1px solid rgba(42, 157, 143, 0.28); border-radius: 12px; padding: 14px; }
.master-qa h3 { color: var(--accent); }
.master-tip { font-size: 14px; color: var(--text); margin-bottom: 12px; line-height: 1.6; }
.master-links { font-size: 12.5px; color: var(--text-sub); display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.master-links a { color: var(--accent); text-decoration: none; }
.master-links a:hover { text-decoration: underline; }
.master-foot { font-size: 12px; color: var(--text-sub); margin-top: 8px; }
/* 结果卡内的「边修边学」区块（与师傅区块互斥，不会同时出现） */
.learn-qa { background: rgba(42,157,143,0.06); border: 1px solid rgba(42,157,143,0.28); border-radius: 12px; padding: 14px; }
.learn-qa h3 { color: var(--accent); }
.learn-tip { font-size: 14px; color: var(--text); margin-bottom: 12px; line-height: 1.6; }
.learn-foot { font-size: 12px; color: var(--text-sub); margin-top: 8px; }

/* ============ 师傅列表页 ============ */
#screen-masters {
  position: fixed; inset: 0; max-width: 480px; margin: 0 auto; left: 0; right: 0;
  background: var(--bg); z-index: 50;
  display: flex; flex-direction: column;
  padding: 0 20px calc(8px + env(safe-area-inset-bottom));
}
#screen-masters[hidden] { display: none !important; }
.screen-head { display: flex; align-items: center; gap: 6px; padding: 14px 0 10px; }
.screen-head .screen-title { font-size: 18px; font-weight: 600; }
.screen-body { flex: 1; overflow-y: auto; padding-bottom: 20px; }
.loc-bar {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px; margin-bottom: 14px; display: flex; flex-direction: column; gap: 8px;
}
.loc-bar .loc-text { font-size: 13px; color: var(--text-sub); }
.loc-row { display: flex; gap: 8px; }
.loc-row select, .loc-row input {
  flex: 1; min-height: 40px; padding: 8px 10px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--text); font-size: 14px; font-family: inherit;
}
.master-list { display: flex; flex-direction: column; gap: 10px; }
.master-card {
  display: flex; gap: 12px; align-items: center;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 12px 14px; cursor: pointer;
}
.master-avatar {
  flex: none; width: 46px; height: 46px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 18px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.master-avatar.lg { width: 56px; height: 56px; font-size: 22px; }
.master-info { flex: 1; min-width: 0; }
.master-line1 { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.master-name { font-size: 16px; font-weight: 600; }
.master-rating { font-size: 13px; color: var(--amber-text); font-weight: 600; }
.master-online { font-size: 11px; padding: 1px 8px; border-radius: 999px; background: rgba(61,139,95,0.16); color: var(--green); }
.master-offline { font-size: 11px; padding: 1px 8px; border-radius: 999px; background: var(--border); color: var(--text-sub); }
.master-line2 { font-size: 12.5px; color: var(--text-sub); margin: 3px 0; }
.master-skills { display: flex; flex-wrap: wrap; gap: 6px; }
.master-skills .chip { font-size: 12px; padding: 2px 10px; }
.master-more { flex: none; font-size: 13px; color: var(--accent); background: none; border: 1px solid var(--border); border-radius: 8px; padding: 6px 12px; cursor: pointer; }
.master-empty { text-align: center; color: var(--text-sub); font-size: 14px; padding: 24px 12px; }

/* ============ 师傅详情弹窗 ============ */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.45);
  display: flex; align-items: flex-end; justify-content: center; z-index: 100;
}
.modal[hidden] { display: none; }
.modal-card {
  width: 100%; max-width: 480px; max-height: 86vh; overflow-y: auto;
  background: var(--bg); border-radius: 18px 18px 0 0;
  padding: 18px 18px calc(18px + env(safe-area-inset-bottom));
}
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.modal-head h3 { font-size: 17px; }
.modal-close { background: none; border: none; font-size: 24px; color: var(--text-sub); width: 36px; height: 36px; cursor: pointer; line-height: 1; }
.mm-head { display: flex; gap: 12px; align-items: center; margin-bottom: 14px; }
.mm-stats { display: flex; gap: 12px; margin-bottom: 12px; }
.mm-stats > div { flex: 1; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 10px; text-align: center; }
.mm-stats b { display: block; font-size: 18px; color: var(--accent); }
.mm-stats span { font-size: 12px; color: var(--text-sub); }
.mm-skills, .mm-certs { font-size: 14px; margin-bottom: 8px; }
.mm-skills b, .mm-certs b { color: var(--text-sub); font-weight: 600; margin-right: 4px; }
.mm-intro, .mm-price { font-size: 14px; color: var(--text); line-height: 1.6; margin-bottom: 8px; }
.mm-price { color: var(--accent-dark); font-weight: 600; }
.mm-qa { margin: 12px 0; }
.mm-qa b { display: block; font-size: 14px; margin-bottom: 6px; }
.mm-qa textarea { width: 100%; }
.mm-note { font-size: 12px; color: var(--text-sub); margin-top: 10px; line-height: 1.6; }

/* ============ 顶栏操作区 ============ */
.topbar-actions { display: flex; align-items: center; gap: 2px; }

/* ============ 首页「工具学习」入口提示 ============ */
.intro-tip {
  display: flex; gap: 10px; align-items: flex-start; width: 100%;
  margin-top: 20px; padding: 12px 14px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; text-align: left; cursor: pointer;
  font-family: inherit; color: inherit;
}
.intro-tip:active { transform: scale(0.99); border-color: var(--accent); }
.intro-tip-icon { flex: none; font-size: 17px; line-height: 1.5; }
.intro-tip-text { font-size: 12.5px; color: var(--text-sub); line-height: 1.65; }
.intro-tip-text b { display: block; color: var(--text); font-size: 13.5px; margin-bottom: 2px; }

/* ============ 互动式学习页 / 工具学习页（与师傅页同层，靠 nav.js 互斥，不会叠加） ============ */
#screen-learn, #screen-tools {
  position: fixed; inset: 0; max-width: 480px; margin: 0 auto; left: 0; right: 0;
  background: var(--bg); z-index: 50;
  display: flex; flex-direction: column;
  padding: 0 20px calc(8px + env(safe-area-inset-bottom));
}

/* ============ 互动式学习页 ============ */
.learn-head {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px; margin-bottom: 12px;
}
.learn-head h3 { font-size: 16px; margin-bottom: 6px; }
.learn-sum { font-size: 13.5px; color: var(--text-sub); line-height: 1.6; }
.learn-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.learn-meta .chip { font-size: 12px; padding: 2px 10px; }

.learn-progress { margin-bottom: 14px; }
.learn-bar { height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; }
.learn-bar > i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .3s ease; }
.learn-progress-text { font-size: 12px; color: var(--text-sub); margin-top: 6px; }

.learn-steps { display: flex; flex-direction: column; gap: 10px; }
.learn-step { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.learn-step.done { border-color: var(--accent); background: rgba(42,157,143,0.06); }
.learn-step-top { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.learn-step-num {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  background: var(--border); color: var(--text-sub); font-size: 13px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.learn-step.done .learn-step-num { background: var(--accent); color: #fff; }
.learn-step-title { font-size: 15px; font-weight: 600; }
.learn-step-body { font-size: 13.5px; line-height: 1.65; }
.learn-step-body > div { margin-bottom: 8px; }
.learn-step-body b { color: var(--text-sub); font-weight: 600; margin-right: 4px; }
.learn-step-risk {
  color: var(--amber-text); background: var(--amber-bg);
  border: 1px solid var(--amber-border); border-radius: 8px; padding: 8px 10px;
}
.learn-step-point { color: var(--text); }
.learn-step-tip { color: var(--text-sub); }
.learn-step-btn {
  margin-top: 8px; min-height: 40px; padding: 8px 16px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 14px; font-family: inherit; cursor: pointer;
}
.learn-step-btn:active { transform: scale(0.985); }
.learn-step.done .learn-step-btn { border-color: var(--accent); color: var(--accent); }
.learn-done {
  margin-top: 14px; background: rgba(61,139,95,0.14); border: 1px solid var(--green);
  border-radius: 12px; padding: 14px; font-size: 14px; color: var(--text); line-height: 1.6;
}
.learn-done b { color: var(--green); }

/* ============ 工具学习页 ============ */
.tool-home-tip { font-size: 13.5px; color: var(--text-sub); line-height: 1.6; margin-bottom: 14px; }
.tool-grid { display: flex; flex-direction: column; gap: 10px; }
.tool-card {
  display: flex; gap: 12px; align-items: center; width: 100%;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 12px 14px; cursor: pointer;
  text-align: left; font-family: inherit; color: inherit;
}
.tool-card:active { transform: scale(0.99); }
.tool-card-icon {
  flex: none; width: 48px; height: 48px; border-radius: 12px;
  background: var(--bg); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.tool-card-icon svg { width: 28px; height: 28px; }
.tool-card-info { flex: 1; min-width: 0; }
.tool-card-name { font-size: 16px; font-weight: 600; }
.tool-card-sub { font-size: 12.5px; color: var(--text-sub); margin: 3px 0; }
.tool-card-prog { font-size: 12px; color: var(--accent); }

.lab-bar { height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; margin-bottom: 8px; }
.lab-bar > i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .3s ease; }
.lab-step-text { font-size: 12px; color: var(--text-sub); margin-bottom: 10px; }
.lab-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.lab-prompt { font-size: 13.5px; color: var(--text-sub); line-height: 1.6; margin-bottom: 12px; }

/* 容器用 aspect-ratio 撑开：SVG（降级）与 WebGL canvas（3D）共用同一个舞台。
   canvas 若容器高度为 0 会塌掉，所以这里必须给容器明确比例。 */
.lab-svg {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  min-height: 190px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 8px; margin-bottom: 12px;
  overflow: hidden;
}
.lab-svg > svg, .lab-svg > canvas {
  position: absolute;
  inset: 8px;
  width: calc(100% - 16px);
  height: calc(100% - 16px);
  display: block;
}
.lab-svg .hot { cursor: pointer; }
.lab-svg .hot:active { opacity: .7; }
.lab-svg .hot:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.lab-svg.shake { animation: shake .3s ease; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.lab-hotkey { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.lab-hotkey button {
  min-height: 42px; padding: 8px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-size: 14px; font-family: inherit; text-align: left; cursor: pointer;
}
.lab-hotkey button:active { border-color: var(--accent); color: var(--accent); }

/* 3D 工具的引导列表（替代点选按钮）：只读提示，交互发生在 3D 模型上 */
.lab-guide-item {
  padding: 9px 12px; border-radius: 10px;
  border: 1px dashed var(--border); background: var(--card);
  color: var(--text-sub); font-size: 13px; line-height: 1.6;
}
.lab-guide-item::before { content: "▶ "; color: var(--accent); font-size: 11px; }

.lab-feedback { font-size: 13.5px; line-height: 1.6; border-radius: 10px; padding: 10px 12px; margin-bottom: 10px; }
.lab-feedback.fb-wrong { background: var(--red-bg); color: var(--red); border: 1px solid var(--red); }
.lab-feedback.fb-pass { background: rgba(61,139,95,0.14); color: var(--green); border: 1px solid var(--green); }
.lab-feedback.fb-info { background: var(--border); color: var(--text-sub); }

.lab-note {
  font-size: 13.5px; line-height: 1.6; border-radius: 10px; padding: 10px 12px; margin-bottom: 10px;
  background: rgba(42,157,143,0.06); border: 1px solid rgba(42,157,143,0.28); color: var(--text);
}
.lab-note b { color: var(--accent); display: block; margin-bottom: 4px; }

.lab-actions { display: flex; gap: 8px; margin-bottom: 12px; }
.lab-actions button {
  flex: 1; min-height: 42px; padding: 8px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-size: 14px; font-family: inherit; cursor: pointer;
}
.lab-actions button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }

.lab-notes { display: flex; flex-direction: column; gap: 8px; }
.lab-notes-title { font-size: 13px; color: var(--text-sub); margin-top: 4px; }
.lab-note-item {
  font-size: 13px; line-height: 1.6; color: var(--text-sub);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 10px;
}

.lab-done {
  margin-top: 4px; background: rgba(61,139,95,0.14);
  border: 1px solid var(--green); border-radius: 12px; padding: 14px;
}
.lab-done h4 { font-size: 15px; color: var(--green); margin-bottom: 8px; }
.lab-done ul { margin: 0; padding-left: 18px; }
.lab-done li { font-size: 13.5px; line-height: 1.65; margin-bottom: 6px; }
.lab-done li.must { font-weight: 600; color: var(--text); }

/* ============ 工具学习：SVG 部件状态（只打 data-*，外观全交给 CSS） ============ */
/* transform-box: fill-box = 绕自身中心变换；view-box = 绕 viewBox 指定坐标变换 */

/* 电钻 · 正反转拨杆：拨块平移 */
[data-part="dir"] .dir-lever { transform-box: fill-box; transform-origin: center; transition: transform .25s ease; }
[data-part="dir"][data-dir="fwd"]  .dir-lever { transform: translateX(11px); }
[data-part="dir"][data-dir="rev"]  .dir-lever { transform: translateX(-11px); }
[data-part="dir"][data-dir="lock"] .dir-lever { transform: translateX(0); }

/* 电钻 · 转向箭头：反转时掉头，锁定时变灰 */
[data-part="dir"] .spin-arrow { transform-box: fill-box; transform-origin: center; transition: transform .25s ease, opacity .25s ease; }
[data-part="dir"][data-dir="rev"]  .spin-arrow { transform: rotate(180deg); }
[data-part="dir"][data-dir="lock"] .spin-arrow { opacity: .25; }

/* 电钻 · 变速档 / 模式档：选中项高亮 */
[data-part="speed"][data-sp="low"]  [data-hot="speed-1"] rect,
[data-part="speed"][data-sp="high"] [data-hot="speed-2"] rect,
[data-part="mode"][data-mode="drill"]  [data-hot="mode-drill"] rect,
[data-part="mode"][data-mode="hammer"] [data-hot="mode-hammer"] rect { fill: var(--accent); stroke: var(--accent-dark); }

/* 电钻 · 扭矩环指针：绕圆心 (173,76) 旋转，1-10 档每档 36 度 */
[data-part="torque"] .torque-dial {
  transform-box: view-box; transform-origin: 173px 76px; transition: transform .25s ease;
}
[data-part="torque"][data-val="1"]  .torque-dial { transform: rotate(0deg); }
[data-part="torque"][data-val="2"]  .torque-dial { transform: rotate(36deg); }
[data-part="torque"][data-val="3"]  .torque-dial { transform: rotate(72deg); }
[data-part="torque"][data-val="4"]  .torque-dial { transform: rotate(108deg); }
[data-part="torque"][data-val="5"]  .torque-dial { transform: rotate(144deg); }
[data-part="torque"][data-val="6"]  .torque-dial { transform: rotate(180deg); }
[data-part="torque"][data-val="7"]  .torque-dial { transform: rotate(216deg); }
[data-part="torque"][data-val="8"]  .torque-dial { transform: rotate(252deg); }
[data-part="torque"][data-val="9"]  .torque-dial { transform: rotate(288deg); }
[data-part="torque"][data-val="10"] .torque-dial { transform: rotate(324deg); }

/* 电钻 · 扳机按下 → 钻头旋转（trigger 与 bit 是兄弟节点，用 ~ 选择器） */
[data-part="bit"] { transform-box: fill-box; transform-origin: center; }
[data-part="trigger"][data-on="1"] ~ [data-part="bit"] { animation: drillspin .4s linear infinite; }
[data-part="trigger"][data-on="1"] rect { fill: var(--accent); }
@keyframes drillspin { to { transform: rotate(360deg); } }

/* ============ 工具学习引导气泡（AI 识别出用户想学工具） ============ */
.toollearn-bubble { display: flex; flex-direction: column; gap: 10px; }
.toollearn-text { font-size: 14px; line-height: 1.65; color: var(--text); }

/* ============ 结果卡：步骤细节追问（点击步骤内联展开） ============ */
.step-ask-btn {
  margin-top: 10px; padding: 6px 12px; min-height: 32px;
  background: none; border: 1px solid var(--border); border-radius: 8px;
  color: var(--accent); font-size: 12.5px; font-family: inherit; cursor: pointer;
}
.step-ask-btn:active { border-color: var(--accent); }
.step-detail-box {
  margin-top: 10px; padding: 10px 12px;
  background: rgba(42,157,143,0.06); border: 1px solid rgba(42,157,143,0.22);
  border-radius: 10px;
}
.step-ask-row { display: flex; gap: 8px; align-items: flex-end; margin-bottom: 10px; }
.step-ask-input {
  flex: 1; min-width: 0; resize: none;
  padding: 8px 10px; min-height: 40px;
  background: var(--card); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  font-size: 13.5px; font-family: inherit; line-height: 1.5;
}
.step-ask-input:focus { outline: none; border-color: var(--accent); }
.step-ask-send {
  flex: none; padding: 8px 14px; min-height: 40px;
  background: var(--accent); color: #fff; border: none; border-radius: 10px;
  font-size: 13px; font-family: inherit; cursor: pointer;
}
.step-ask-send:active { opacity: .85; }
.step-detail-result { min-height: 8px; }
.step-detail-title { font-size: 13.5px; font-weight: 600; color: var(--accent); margin-bottom: 6px; }
.step-detail-list { margin: 0; padding-left: 18px; }
.step-detail-list li { font-size: 13px; line-height: 1.65; color: var(--text); margin-bottom: 4px; }
.step-detail-warn {
  margin-top: 6px; font-size: 12.5px; line-height: 1.6;
  color: var(--amber-text); background: var(--amber-bg);
  border: 1px solid var(--amber-border); border-radius: 8px; padding: 7px 9px;
}
.step-detail-loading { font-size: 12.5px; color: var(--text-sub); }

/* ============ 结果卡：底部重新提问 ============ */
.result-actions { margin-top: 14px; }

/* ============ typing 气泡的阶段文案（视频上传中 / 分析中） ============ */
.typing-label { font-size: 12px; color: var(--text-sub); margin-top: 6px; }

/* ============ 语音输入按钮的录音态 ============ */
.composer-ico.recording {
  background: var(--red); border-radius: 10px;
  animation: voicePulse 1.1s ease-in-out infinite;
}
@keyframes voicePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}