:root {
  --ink: #10231e;
  --muted: #61716b;
  --paper: #f7f4ed;
  --paper-deep: #ede9dd;
  --green: #0b5d46;
  --green-deep: #073e31;
  --lime: #d7f34a;
  --red: #b9412b;
  --line: rgba(16, 35, 30, .14);
  --line-on-dark: rgba(255, 255, 255, .18);

  --shell: 1220px;
  --shell-inner: 1164px;
  /* 流体间距：手机 18px → 桌面 28px；纵向 52px → 112px */
  --pad-x: clamp(18px, 4.2vw, 28px);
  --pad-y: clamp(52px, 8.4vw, 112px);
  --gap-xl: clamp(38px, 6.6vw, 100px);
  --gap-lg: clamp(28px, 4.6vw, 72px);
  --gap-md: clamp(16px, 2.2vw, 28px);
  --gap-sm: clamp(12px, 1.6vw, 18px);
  /* 流体字号 */
  --fs-body: clamp(14px, 1.05vw, 15px);
  --fs-small: clamp(12px, .95vw, 13px);
  --fs-mini: clamp(11px, .85vw, 12px);
  --lh-body: 1.95;
  --tap: 44px; /* 最小可点击区域 */
}

/* ============================================================
   2. 基础
   ============================================================ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: clip; /* 用 clip 而非 hidden，避免破坏 sticky */
  overflow-wrap: anywhere;
  word-break: break-word;
}
a { color: inherit; text-decoration: none; }
button, summary, a { -webkit-tap-highlight-color: rgba(11, 93, 70, .12); }
img, svg, video { max-width: 100%; height: auto; }
h1, h2, h3, h4 { text-wrap: balance; }
p { text-wrap: pretty; }
[id] { scroll-margin-top: 24px; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 2px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ============================================================
   3. 版心与标题
   ============================================================ */
.section-wrap { max-width: var(--shell); margin: 0 auto; padding: var(--pad-y) var(--pad-x); }
.section-kicker { margin-bottom: 18px; color: var(--green); font-size: var(--fs-mini); font-weight: 900; letter-spacing: .18em; text-transform: uppercase; }
.section-kicker::before { content: ""; display: inline-block; width: 24px; height: 2px; margin: 0 10px 3px 0; background: currentColor; vertical-align: middle; }
.section-kicker.light { color: var(--lime); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: var(--gap-lg); margin-bottom: var(--gap-lg); }
.section-heading.compact { margin-bottom: clamp(30px, 4vw, 48px); }
.section-heading h2, .answer h2, .costs h2, .tax h2, .faq h2, .method h2, .section-wrap > h2 {
  margin: 0;
  font-family: "Songti SC", SimSun, serif;
  font-size: clamp(27px, 4.4vw, 50px);
  line-height: 1.2;
  letter-spacing: -.04em;
}
.section-heading > p { flex: 1 1 260px; max-width: 410px; margin: 0 0 5px; color: var(--muted); font-size: var(--fs-small); line-height: 1.9; }
.prose p, .answer-copy p { margin: 0 0 18px; color: var(--muted); font-size: var(--fs-body); line-height: var(--lh-body); }
.prose strong, .answer-copy strong { color: var(--ink); }

/* ============================================================
   4. 页头 / 导航 / 面包屑
   ============================================================ */
.site-header { max-width: var(--shell); margin: 0 auto; padding: 0 var(--pad-x); min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: var(--gap-md); border-bottom: 1px solid var(--line); }
.brand { min-height: var(--tap); display: flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.02em; white-space: nowrap; }
.brand-mark { flex: 0 0 auto; width: 35px; height: 35px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: var(--lime); font: 800 18px/1 Georgia, serif; }
.main-nav { display: flex; gap: clamp(14px, 2.4vw, 30px); color: #42534d; font-size: var(--fs-small); }
.main-nav a { min-height: var(--tap); display: inline-flex; align-items: center; white-space: nowrap; }
.main-nav a:hover { color: var(--green); }
.header-cta { min-height: var(--tap); padding: 0 18px; display: inline-flex; align-items: center; border: 1px solid var(--ink); border-radius: 4px; font-size: var(--fs-small); font-weight: 700; white-space: nowrap; transition: .2s ease; }
.header-cta:hover { background: var(--ink); color: white; }
.crumb { max-width: var(--shell); margin: 0 auto; padding: 14px var(--pad-x) 0; font-size: var(--fs-mini); color: #7f8b87; }
.crumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 8px; }
.crumb li::after { content: "/"; margin-left: 8px; color: var(--line); }
.crumb li:last-child::after { content: ""; }
.crumb a { color: var(--green); display: inline-block; padding: 6px 0; }
.crumb a:hover { text-decoration: underline; }

/* ============================================================
   5. 首屏
   ============================================================ */
.hero { max-width: var(--shell); margin: 0 auto; padding: clamp(34px, 5.5vw, 64px) var(--pad-x) var(--pad-y); display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: var(--gap-xl); position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; width: 410px; height: 410px; border: 1px solid rgba(11, 93, 70, .12); border-radius: 50%; right: -150px; top: 60px; pointer-events: none; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 20px; color: var(--green); font-size: var(--fs-small); font-weight: 800; letter-spacing: .1em; }
.eyebrow i { flex: 0 0 auto; display: block; width: 28px; height: 2px; background: var(--green); }
h1 { margin: 0; max-width: 690px; font-family: "Songti SC", SimSun, serif; font-size: clamp(32px, 5.4vw, 64px); line-height: 1.18; letter-spacing: -.05em; font-weight: 800; }
h1 em { font-style: normal; color: var(--green); background: linear-gradient(transparent 66%, var(--lime) 66%, var(--lime) 94%, transparent 94%); }
.hero-lede { max-width: 620px; margin: 24px 0 0; color: var(--muted); font-size: clamp(14px, 1.15vw, 16px); line-height: var(--lh-body); }
.hero-lede b { color: var(--ink); font-weight: 700; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 30px; }
.button { min-height: 51px; padding: 12px 22px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; border-radius: 4px; font-size: var(--fs-small); font-weight: 800; text-align: center; transition: .2s ease; }
.button.primary { background: var(--green); color: white; box-shadow: 0 8px 22px rgba(11, 93, 70, .14); }
.button.primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(11, 93, 70, .2); }
.button.primary i { color: var(--lime); font-style: normal; font-size: 20px; }
.button.secondary { border: 1px solid var(--line); background: rgba(255, 255, 255, .45); }
.button.secondary:hover { border-color: var(--ink); }
.disclaimer { margin: 16px 0 0; color: #86918d; font-size: var(--fs-mini); }
.byline { margin: 8px 0 0; color: #86918d; font-size: var(--fs-mini); line-height: 1.9; }
.byline time { color: var(--green); font-weight: 700; }
.path-card { position: relative; padding: 0 clamp(18px, 2.4vw, 30px) 22px; background: #fffdf8; border: 1px solid rgba(16, 35, 30, .12); box-shadow: clamp(8px, 1.6vw, 20px) clamp(10px, 1.9vw, 24px) 0 var(--paper-deep); }
.path-card::before { content: ""; position: absolute; width: 88px; height: 5px; top: -3px; right: 34px; background: var(--lime); }
.path-card-head { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); }
.path-card-head p { margin: 0; font-family: "Songti SC", serif; font-size: clamp(18px, 1.8vw, 21px); font-weight: 800; }
.path-card-head em { color: #87918d; font: normal 700 11px Georgia, serif; letter-spacing: .14em; }
.path-card ol { list-style: none; padding: 6px 0; margin: 0; }
.path-card li { min-height: 76px; padding: 12px 0; display: grid; grid-template-columns: 40px 1fr 24px; gap: 12px; align-items: center; border-bottom: 1px solid var(--line); }
.path-card li:last-child { border-bottom: 0; }
.path-card i { font: normal 700 12px Georgia, serif; color: var(--green); }
.path-card li div { display: grid; gap: 5px; }
.path-card li em { font-style: normal; font-size: var(--fs-body); font-weight: 700; }
.path-card li span { color: #74817c; font-size: var(--fs-mini); }
.path-card li u { width: 24px; height: 24px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--green); font-size: 12px; text-decoration: none; }
.path-note { margin: 0; padding: 13px; display: flex; align-items: center; gap: 9px; background: #eef4df; color: #496039; font-size: var(--fs-mini); font-weight: 700; line-height: 1.6; }
.path-note i { flex: 0 0 20px; width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: var(--lime); color: var(--ink); font-style: normal; }

/* ============================================================
   6. 数据条 —— 自适应换行，不再靠固定 gap
   ============================================================ */
.signal-strip { max-width: var(--shell-inner); margin: 0 auto; padding: clamp(20px, 2.6vw, 26px) clamp(20px, 3vw, 32px); display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); align-items: center; gap: var(--gap-md); border: 1px solid var(--line); border-left: 5px solid var(--green); background: #fffdf9; }
.signal-strip div { display: flex; align-items: center; gap: 12px; }
.signal-strip em { font: normal 800 clamp(24px, 2.4vw, 28px) Georgia, serif; color: var(--green); }
.signal-strip span { color: var(--muted); font-size: var(--fs-mini); line-height: 1.5; }
.signal-strip > p { margin: 0; color: #7f8b87; font-size: var(--fs-mini); text-align: right; }

/* ============================================================
   7. 目录
   ============================================================ */
.toc { max-width: var(--shell-inner); margin: clamp(38px, 5vw, 60px) auto 0; padding: clamp(22px, 2.8vw, 30px) clamp(20px, 3vw, 34px); background: #fffdf8; border: 1px solid var(--line); }
.toc h2 { margin: 0 0 16px; font: 800 clamp(17px, 1.8vw, 20px) "Songti SC", SimSun, serif; letter-spacing: -.02em; }
.toc ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 232px), 1fr)); gap: 4px clamp(20px, 2.6vw, 32px); counter-reset: toc; }
.toc li { counter-increment: toc; border-bottom: 1px dashed var(--line); }
.toc a { min-height: var(--tap); display: flex; align-items: center; gap: 10px; font-size: var(--fs-small); color: #3d4d48; }
.toc a::before { content: counter(toc, decimal-leading-zero); color: var(--green); font: 700 11px Georgia, serif; }
.toc a:hover { color: var(--green); }

/* ============================================================
   8. 结论区
   ============================================================ */
.answer-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: var(--gap-xl); }
.source-link { min-height: var(--tap); display: inline-flex; align-items: center; gap: 12px; color: var(--green); font-size: var(--fs-small); font-weight: 800; border-bottom: 1px solid currentColor; }
.source-link i { font-style: normal; font-size: 17px; }
.boundary-card { margin-top: clamp(34px, 5vw, 58px); padding: clamp(20px, 2.4vw, 26px); display: grid; grid-template-columns: 42px 1fr auto; gap: clamp(14px, 1.8vw, 20px); align-items: center; border: 1px solid rgba(185, 65, 43, .25); background: #fbefe9; }
.boundary-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: var(--red); color: white; font-weight: 900; font-style: normal; }
.boundary-card h3 { margin: 0; font-size: var(--fs-body); }
.boundary-card p { margin: 6px 0 0; color: #775f58; font-size: var(--fs-small); line-height: 1.75; }
.boundary-card > em { padding: 8px 11px; background: white; color: var(--red); font: normal 700 11px/1 sans-serif; letter-spacing: .1em; white-space: nowrap; }

/* ============================================================
   9. 六步流程 + 流程图
   ============================================================ */
.steps { max-width: none; padding-left: max(var(--pad-x), calc((100% - var(--shell-inner)) / 2)); padding-right: max(var(--pad-x), calc((100% - var(--shell-inner)) / 2)); background: var(--green-deep); color: white; }
.steps .section-heading > p { color: #adc2ba; }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 258px), 1fr)); border-top: 1px solid var(--line-on-dark); border-left: 1px solid var(--line-on-dark); }
.step-card { min-height: clamp(190px, 22vw, 250px); padding: clamp(22px, 2.6vw, 32px); border-right: 1px solid var(--line-on-dark); border-bottom: 1px solid var(--line-on-dark); transition: .25s ease; }
.step-card:hover { background: rgba(215, 243, 74, .07); }
.step-number { display: block; color: var(--lime); font: normal 700 11px Georgia, serif; letter-spacing: .14em; }
.step-card h3 { margin: clamp(26px, 4vw, 52px) 0 12px; font-family: "Songti SC", SimSun, serif; font-size: clamp(19px, 2vw, 22px); }
.step-card p { margin: 0; color: #b8cac3; font-size: var(--fs-small); line-height: 1.85; }
.flow-figure { margin: clamp(38px, 5vw, 64px) 0 0; padding: clamp(18px, 2.6vw, 30px); background: rgba(255, 255, 255, .05); border: 1px solid var(--line-on-dark); }
.flow-scroll { overflow-x: auto; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; }
.flow-scroll svg { display: block; width: 100%; min-width: 660px; height: auto; }
.flow-figure figcaption { margin-top: 14px; color: #9db0a8; font-size: var(--fs-mini); text-align: center; }

/* ============================================================
   10. 对比表格 —— 桌面横排，窄屏自动改为卡片式堆叠
   ============================================================ */
.table-scroll { overflow-x: auto; overscroll-behavior-x: contain; border-top: 2px solid var(--ink); }
table.compare { width: 100%; min-width: 600px; border-collapse: collapse; }
table.compare caption { padding: 0 0 14px; color: var(--muted); font-size: var(--fs-small); line-height: 1.75; text-align: left; }
table.compare th, table.compare td { padding: clamp(14px, 1.6vw, 17px) clamp(14px, 2vw, 24px); border-bottom: 1px solid var(--line); text-align: left; font-size: var(--fs-body); font-weight: 500; vertical-align: middle; }
table.compare thead th { background: var(--paper-deep); color: var(--green); font-size: var(--fs-body); font-weight: 800; }
table.compare tbody th { color: var(--muted); font-size: var(--fs-small); font-weight: 500; width: 24%; }
table.compare th + th, table.compare td { border-left: 1px solid var(--line); }
.table-source { margin: 14px 0 0; color: #7f8b87; font-size: var(--fs-mini); line-height: 1.8; text-align: right; }
.table-source a { color: var(--green); font-weight: 700; display: inline-block; padding: 6px 0; }

/* 只有两列的表格：堆叠模式下不渲染空标签位 */
table.compare td:not([data-label]) { display: block; }
table.compare td:not([data-label])::before { content: none; }

/* ============================================================
   10b. 速答框 —— 每节开头的直接答案，提升搜索摘要抽取率
   ============================================================ */
.key-answer {
  margin: 0 0 26px;
  padding: clamp(16px, 2.2vw, 22px) clamp(18px, 2.4vw, 26px);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  background: #eef4df;
  border-left: 4px solid var(--green);
}
.key-answer > i {
  flex: 0 0 auto;
  padding: 4px 8px;
  border-radius: 3px;
  background: var(--green);
  color: var(--lime);
  font: normal 800 11px/1.5 sans-serif;
  letter-spacing: .08em;
  white-space: nowrap;
}
.key-answer p { margin: 0; color: #294a3d; font-size: var(--fs-body); font-weight: 600; line-height: 1.85; }
.key-answer.on-dark { background: rgba(215, 243, 74, .1); border-left-color: var(--lime); }
.key-answer.on-dark > i { background: var(--lime); color: var(--green-deep); }
.key-answer.on-dark p { color: #e6f0e9; }
@media (max-width: 560px) {
  .key-answer { grid-template-columns: 1fr; gap: 10px; }
  .key-answer > i { justify-self: start; }
}

/* ============================================================
   10c. 两类路径对比
   ============================================================ */
.paths-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: var(--gap-sm); margin-bottom: clamp(28px, 4vw, 44px); }
.path-col { padding: clamp(22px, 2.6vw, 30px); border: 1px solid var(--line); background: #fffdf9; }
.path-col.accent { border-color: rgba(11, 93, 70, .4); box-shadow: inset 0 3px 0 var(--green); }
.path-col > i { color: var(--green); font: normal 700 11px Georgia, serif; letter-spacing: .14em; }
.path-col h3 { margin: 14px 0 10px; font: 800 clamp(18px, 2vw, 21px) "Songti SC", SimSun, serif; }
.path-col > p { margin: 0 0 14px; color: var(--muted); font-size: var(--fs-small); line-height: 1.85; }
.path-col ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.path-col li { position: relative; padding-left: 20px; color: var(--muted); font-size: var(--fs-small); line-height: 1.8; }
.path-col li::before { content: "—"; position: absolute; left: 0; top: 0; color: var(--green); }
.path-col li strong { color: var(--ink); }
.myth {
  margin-top: clamp(24px, 3.4vw, 36px);
  padding: clamp(18px, 2.2vw, 24px) clamp(20px, 2.4vw, 26px);
  display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start;
  border: 1px dashed rgba(185, 65, 43, .4); background: #fbefe9;
}
.myth > i { padding: 4px 8px; background: var(--red); color: #fff; font: normal 800 11px/1.5 sans-serif; white-space: nowrap; }
.myth h3 { margin: 0 0 6px; font-size: var(--fs-body); }
.myth p { margin: 0; color: #775f58; font-size: var(--fs-small); line-height: 1.85; }
@media (max-width: 560px) { .myth { grid-template-columns: 1fr; gap: 10px; } .myth > i { justify-self: start; } }

/* ============================================================
   10d. bstocks 实操章节（含广告标识）
   ============================================================ */
.bs-section { position: relative; border: 1px solid rgba(11, 93, 70, .3); background: linear-gradient(168deg, #fffdf8 0%, #f4f8ea 100%); padding: clamp(26px, 4vw, 52px); }
.bs-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; margin-bottom: 18px; }
.bs-adtag { padding: 4px 9px; border: 1px solid rgba(11, 93, 70, .4); border-radius: 3px; color: var(--green); font: 800 11px/1.4 sans-serif; letter-spacing: .08em; }
.bs-logo { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 10px; background: var(--green); color: var(--lime); font: 800 21px/1 Georgia, serif; }
.bs-section h2 { margin: 0 0 6px; }
.bs-sub { margin: 0 0 26px; color: var(--muted); font-size: var(--fs-body); line-height: 1.9; }
.bs-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: var(--gap-sm); margin: 0 0 clamp(24px, 3vw, 34px); padding: 0; list-style: none; }
.bs-steps li { padding: clamp(18px, 2.2vw, 24px); background: #fff; border: 1px solid var(--line); }
.bs-steps b { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--lime); color: var(--green-deep); font: 800 12px/1 Georgia, serif; }
.bs-steps h3 { margin: 14px 0 8px; font: 800 clamp(16px, 1.7vw, 18px) "Songti SC", SimSun, serif; }
.bs-steps p { margin: 0; color: var(--muted); font-size: var(--fs-mini); line-height: 1.8; }
.bs-note { padding: clamp(18px, 2.2vw, 24px) clamp(20px, 2.4vw, 26px); background: #fff; border-left: 4px solid var(--green); margin-bottom: clamp(22px, 3vw, 30px); }
.bs-note h3 { margin: 0 0 8px; font-size: var(--fs-body); }
.bs-note p { margin: 0; color: var(--muted); font-size: var(--fs-small); line-height: 1.9; }
.bs-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.bs-cta .promo-btn.primary { background: var(--green); color: #fff; }
.bs-cta .promo-btn.ghost { border-color: rgba(11, 93, 70, .45); color: var(--green); }
.bs-cta .promo-btn.ghost:hover { background: rgba(11, 93, 70, .08); }
.bs-risk { flex: 1 1 220px; margin: 0; color: #86918d; font-size: var(--fs-mini); line-height: 1.7; }
.bs-inline { margin: 18px 0 0; padding: 14px 16px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; background: rgba(215, 243, 74, .16); border: 1px dashed rgba(11, 93, 70, .35); font-size: var(--fs-mini); line-height: 1.7; color: #3d4d48; }
.bs-inline em { flex: 0 0 auto; padding: 2px 6px; background: var(--green); color: var(--lime); font: normal 800 10px/1.6 sans-serif; }
.bs-inline a { color: var(--green); font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.step-card .bs-inline { background: rgba(215, 243, 74, .12); border-color: rgba(215, 243, 74, .4); color: #cfe0d8; margin-top: 14px; }
.step-card .bs-inline a { color: var(--lime); }

/* ============================================================
   11. 检查清单
   ============================================================ */
.checklist-block { margin-top: clamp(40px, 6vw, 72px); padding: clamp(26px, 3.6vw, 48px); display: grid; grid-template-columns: .75fr 1.25fr; gap: var(--gap-lg); background: #fffdf8; border: 1px solid var(--line); }
.mini-label { margin: 0 0 12px; color: var(--green); font-size: clamp(11px, .9vw, 12px); font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.checklist-block h3 { margin: 0; font: 800 clamp(21px, 2.6vw, 28px)/1.3 "Songti SC", SimSun, serif; }
.checklist { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); gap: var(--gap-md); }
.checklist li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; }
.checklist li > i { color: var(--green); font: normal 700 11px Georgia, serif; }
.checklist h4 { margin: 0; font-size: var(--fs-body); }
.checklist p { margin: 6px 0 0; color: var(--muted); font-size: var(--fs-mini); line-height: 1.75; }

/* ============================================================
   12. 交易规则
   ============================================================ */
.order-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: var(--gap-sm); }
.order-grid article { min-height: clamp(180px, 20vw, 230px); padding: clamp(22px, 2.4vw, 29px); border: 1px solid var(--line); background: #fffdf9; }
.order-grid article > i { display: inline-block; padding: 6px 9px; background: #e6efdd; color: var(--green); font: normal 800 11px Georgia, serif; letter-spacing: .14em; }
.order-grid h3 { margin: clamp(22px, 3vw, 38px) 0 12px; font: 800 clamp(19px, 2.1vw, 23px) "Songti SC", SimSun, serif; }
.order-grid p { margin: 0; color: var(--muted); font-size: var(--fs-small); line-height: 1.8; }
.hours-panel { margin-top: var(--gap-sm); padding: clamp(30px, 4vw, 48px) clamp(24px, 4.4vw, 60px); display: grid; grid-template-columns: .75fr 1.25fr; gap: var(--gap-lg); align-items: center; background: var(--green); color: white; }
.clock-face { justify-self: center; width: min(270px, 62vw); aspect-ratio: 1; border: 1px solid rgba(255, 255, 255, .3); border-radius: 50%; position: relative; display: flex; align-items: center; justify-content: space-between; padding: clamp(16px, 2.4vw, 25px); font: 700 12px Georgia, serif; color: var(--lime); }
.clock-face::before, .clock-face::after { content: ""; position: absolute; background: rgba(255, 255, 255, .15); }
.clock-face::before { width: 1px; top: 0; bottom: 0; left: 50%; }
.clock-face::after { height: 1px; left: 0; right: 0; top: 50%; }
.clock-face i { width: 48%; height: 48%; border-radius: 50%; border: 8px solid var(--lime); border-left-color: transparent; transform: rotate(-35deg); z-index: 1; }
.clock-face span { z-index: 1; }
.hours-panel h3 { margin: 0 0 14px; font: 800 clamp(22px, 2.8vw, 30px) "Songti SC", SimSun, serif; }
.hours-panel p:not(.mini-label) { color: #bfd1ca; font-size: var(--fs-small); line-height: var(--lh-body); }
.hours-panel p strong { color: white; }
.hours-panel .mini-label { color: var(--lime); }
.source-link.dark { color: var(--lime); }

/* ============================================================
   13. 成本
   ============================================================ */
.costs { max-width: none; padding-left: max(var(--pad-x), calc((100% - var(--shell-inner)) / 2)); padding-right: max(var(--pad-x), calc((100% - var(--shell-inner)) / 2)); display: grid; grid-template-columns: .9fr 1.1fr; gap: var(--gap-xl); background: #10231e; color: white; }
.cost-title-block > p { max-width: 380px; color: #a7b8b1; font-size: var(--fs-small); line-height: 1.9; }
.cost-list { list-style: none; margin: 0; padding: 0; }
.cost-list > li { min-height: 86px; padding: 16px 0; display: grid; grid-template-columns: 38px .8fr 1.2fr; align-items: center; gap: 14px; border-bottom: 1px solid rgba(255, 255, 255, .17); }
.cost-list > li:first-child { border-top: 1px solid rgba(255, 255, 255, .17); }
.cost-list i { color: var(--lime); font: normal 700 11px Georgia, serif; }
.cost-list h3 { margin: 0; font-size: var(--fs-body); }
.cost-list p { margin: 0; color: #9db0a8; font-size: var(--fs-mini); line-height: 1.75; }

/* ============================================================
   14. 税务
   ============================================================ */
.tax-card { padding: clamp(26px, 4vw, 60px); display: grid; grid-template-columns: .85fr 1.15fr; gap: var(--gap-lg); align-items: center; background: #fffdf8; border: 1px solid var(--line); }
.form-mock { min-height: clamp(240px, 26vw, 340px); padding: clamp(24px, 3vw, 36px); display: flex; flex-direction: column; border: 1px solid var(--line); box-shadow: clamp(6px, 1.2vw, 14px) clamp(8px, 1.4vw, 16px) 0 var(--paper-deep); transform: rotate(-2deg); background: white; position: relative; }
.form-mock span { font: 700 11px Georgia, serif; letter-spacing: .2em; }
.form-mock em { margin-top: clamp(20px, 3vw, 34px); color: var(--green); font: normal 800 clamp(36px, 5vw, 58px) Georgia, serif; }
.form-mock i { margin-bottom: clamp(22px, 3vw, 35px); color: var(--muted); font: italic 12px Georgia, serif; }
.form-mock u { display: block; height: 1px; margin: 13px 0; background: var(--line); text-decoration: none; }
.form-mock b { position: absolute; right: 24px; bottom: 22px; width: 43px; height: 43px; display: grid; place-items: center; border-radius: 50%; background: var(--lime); color: var(--green); }
.tax-copy p { color: var(--muted); font-size: var(--fs-body); line-height: 2; }
.tax-copy strong { color: var(--ink); }

/* ============================================================
   15. 风险
   ============================================================ */
.risk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 218px), 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.risk-grid article { min-height: clamp(180px, 21vw, 244px); padding: clamp(20px, 2.4vw, 27px); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.risk-grid i { display: block; color: var(--red); font: normal 700 11px Georgia, serif; }
.risk-grid h3 { margin: clamp(26px, 4.4vw, 58px) 0 11px; font: 800 clamp(16px, 1.7vw, 18px) "Songti SC", SimSun, serif; }
.risk-grid p { margin: 0; color: var(--muted); font-size: var(--fs-mini); line-height: 1.85; }
.red-flag { margin-top: 20px; padding: clamp(18px, 2.2vw, 22px) clamp(20px, 2.6vw, 26px); display: flex; flex-wrap: wrap; align-items: center; gap: 12px clamp(16px, 2.4vw, 25px); background: #fbefe9; border-left: 4px solid var(--red); }
.red-flag em { flex: 0 0 auto; color: var(--red); font: normal 900 11px sans-serif; letter-spacing: .12em; }
.red-flag p { flex: 1 1 240px; margin: 0; color: #6d554f; font-size: var(--fs-small); line-height: 1.8; }

/* ============================================================
   16. FAQ
   ============================================================ */
.faq { display: grid; grid-template-columns: .75fr 1.25fr; gap: var(--gap-xl); border-top: 1px solid var(--line); }
.faq-intro { position: sticky; top: 24px; align-self: start; }
.faq-intro > p { color: var(--muted); font-size: var(--fs-small); line-height: 1.9; }
.faq-list { border-top: 2px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: var(--tap); padding: 20px 0; display: grid; grid-template-columns: 34px 1fr 30px; align-items: center; gap: 10px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i { color: var(--green); font: normal 700 11px Georgia, serif; }
.faq-list summary h3 { margin: 0; font-size: var(--fs-body); font-weight: 800; line-height: 1.55; }
.faq-list summary u { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; font-size: 16px; text-decoration: none; transition: .2s; }
.faq-list details[open] summary u { transform: rotate(45deg); background: var(--green); color: white; }
.faq-list details > p { margin: -4px clamp(0px, 3vw, 40px) 24px 44px; color: var(--muted); font-size: var(--fs-small); line-height: var(--lh-body); }

/* ============================================================
   17. 相关阅读 / 编辑说明 / 页脚
   ============================================================ */
.related { border-top: 1px solid var(--line); }
.related-grid { margin-top: clamp(28px, 4vw, 44px); display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 238px), 1fr)); gap: var(--gap-sm); }
.related-grid a { display: block; padding: clamp(20px, 2.4vw, 26px); border: 1px solid var(--line); background: #fffdf9; transition: .2s ease; }
.related-grid a:hover { border-color: var(--green); transform: translateY(-2px); }
.related-grid i { color: var(--green); font: normal 700 11px Georgia, serif; letter-spacing: .14em; }
.related-grid h3 { margin: 14px 0 8px; font: 800 clamp(16px, 1.6vw, 17px) "Songti SC", SimSun, serif; }
.related-grid p { margin: 0; color: var(--muted); font-size: var(--fs-mini); line-height: 1.75; }
.method { max-width: none; padding-left: max(var(--pad-x), calc((100% - var(--shell-inner)) / 2)); padding-right: max(var(--pad-x), calc((100% - var(--shell-inner)) / 2)); display: grid; grid-template-columns: .8fr 1.2fr; gap: var(--gap-xl); background: var(--green); color: white; }
.method-copy { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); gap: var(--gap-md); }
.method-copy p { margin: 0; color: #bfd0ca; font-size: var(--fs-small); line-height: 2; }
.method-copy time { color: var(--lime); font-weight: 700; }
footer { max-width: var(--shell); margin: 0 auto; padding: clamp(36px, 5vw, 54px) var(--pad-x) 28px; }
.footer-top { display: grid; grid-template-columns: 1fr 1fr auto; align-items: start; gap: var(--gap-md); }
.footer-top > p { margin: 9px 0 0; color: var(--muted); font-size: var(--fs-small); }
.footer-links { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 0 clamp(12px, 1.8vw, 18px); font-size: var(--fs-mini); color: var(--green); font-weight: 700; }
.footer-links a { min-height: var(--tap); display: inline-flex; align-items: center; }
.footer-links a:hover { text-decoration: underline; }
.footer-bottom { margin-top: clamp(20px, 3vw, 30px); padding-top: 22px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 20px; border-top: 1px solid var(--line); color: #7b8783; font-size: clamp(11px, .85vw, 12px); letter-spacing: .05em; }

/* ============================================================
   18. 断点 —— 仅处理 auto-fit 无法解决的“非对称双栏”
   ============================================================ */

/* 笔记本 / 横屏平板：收窄超大留白 */
@media (max-width: 1100px) {
  .answer-grid, .costs, .faq, .method { gap: clamp(32px, 5vw, 60px); }
  .hero { gap: clamp(36px, 5vw, 60px); }
}

/* 竖屏平板及以下：所有非对称双栏落为单栏 */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero::before { display: none; }
  .answer-grid, .costs, .tax-card, .faq, .method, .checklist-block, .hours-panel, .footer-top { grid-template-columns: 1fr; }
  .section-heading { flex-direction: column; align-items: stretch; gap: 20px; }
  .section-heading > p { max-width: none; }
  .faq-intro { position: static; }
  .tax-card { display: flex; flex-direction: column-reverse; }
  .form-mock { align-self: center; width: min(360px, 100%); }
}

/* 大屏手机 / 小平板：导航改为可横滑，不再隐藏（保住移动端内链） */
@media (max-width: 820px) {
  .site-header { flex-wrap: wrap; padding-top: 12px; padding-bottom: 4px; min-height: 0; row-gap: 0; }
  .header-cta { margin-left: auto; }
  .main-nav {
    order: 3;
    width: 100%;
    margin-top: 4px;
    padding-bottom: 2px;
    gap: 20px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    /* 右侧渐隐，提示可横滑 */
    mask-image: linear-gradient(90deg, #000 88%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent 100%);
  }
  .main-nav::-webkit-scrollbar { display: none; }
  .main-nav a { min-height: 40px; }
}

/* 手机 */
@media (max-width: 700px) {
  .header-cta { display: none; }
  .signal-strip { border-left-width: 4px; }
  .signal-strip > p { text-align: left; }
  .cost-list > li { grid-template-columns: 32px 1fr; row-gap: 6px; }
  .cost-list p { grid-column: 2; }
  .red-flag { flex-direction: column; align-items: flex-start; }
}

/* 表格 → 卡片式堆叠：窄屏不再横向滚动 */
@media (max-width: 640px) {
  .table-scroll { overflow: visible; border-top: 0; }
  table.compare { min-width: 0; display: block; }
  table.compare caption { display: block; width: 100%; padding-bottom: 16px; }
  table.compare thead { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  table.compare tbody, table.compare tr, table.compare th, table.compare td { display: block; width: auto; }
  table.compare tr { margin-bottom: 14px; border: 1px solid var(--line); background: #fffdf9; }
  table.compare tbody th { width: auto; padding: 12px 16px; background: var(--paper-deep); color: var(--green); font-size: var(--fs-small); font-weight: 800; border-left: 0; border-bottom: 1px solid var(--line); }
  table.compare td { padding: 12px 16px; display: grid; grid-template-columns: 5.2em 1fr; gap: 12px; align-items: start; border-left: 0; font-size: var(--fs-small); }
  table.compare tr td:last-child { border-bottom: 0; }
  table.compare td::before { content: attr(data-label); color: var(--green); font-size: var(--fs-mini); font-weight: 800; }
  .table-source { text-align: left; }
}

/* 小屏手机 */
@media (max-width: 480px) {
  :root { --lh-body: 1.85; }
  .hero-actions .button { width: 100%; }
  .boundary-card { grid-template-columns: 34px 1fr; }
  .boundary-card > em { grid-column: 2; justify-self: start; }
  .toc a { min-height: 42px; }
  .faq-list summary { grid-template-columns: 30px 1fr 26px; }
  .faq-list details > p { margin-left: 40px; margin-right: 0; }
  .form-mock { transform: none; box-shadow: 6px 8px 0 var(--paper-deep); }
  .path-card::before { right: 20px; }
}

/* 超窄屏（≤360px）兜底 */
@media (max-width: 360px) {
  :root { --pad-x: 14px; }
  h1 { font-size: 28px; letter-spacing: -.04em; }
  .brand span:last-child { font-size: 14px; }
  .path-card li { grid-template-columns: 32px 1fr; }
  .path-card li u { display: none; }
}

/* 手机横屏：避免首屏被撑高、sticky 抢占视口 */
@media (max-height: 520px) and (orientation: landscape) {
  .hero { padding-top: 24px; padding-bottom: 40px; }
  .faq-intro { position: static; }
  .step-card, .order-grid article, .risk-grid article { min-height: 0; }
}

/* ============================================================
   19. 可访问性 / 打印
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media (prefers-contrast: more) {
  :root { --muted: #3d4d48; --line: rgba(16, 35, 30, .32); }
}
@media print {
  body { background: white; color: black; font-size: 11pt; }
  .site-header, .main-nav, .header-cta, .hero-actions, .toc, .related, .footer-links, .path-card::before { display: none !important; }
  .hero, .section-wrap, .costs, .steps, .method { padding: 12pt 0 !important; background: white !important; color: black !important; }
  .steps *, .costs *, .method *, .hours-panel * { color: black !important; }
  .hours-panel, .step-card, .related-grid a { background: white !important; border-color: #999 !important; }
  .answer-grid, .faq, .costs, .tax-card, .method, .hours-panel, .checklist-block { grid-template-columns: 1fr !important; gap: 12pt !important; }
  .faq-list details > p { display: block !important; }
  .faq-list summary u, .flow-figure { display: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 8pt; color: #555; }
  section, article, tr, .step-card { break-inside: avoid; }
  .promo-bar { display: none !important; }
}

/* ============================================================
   20. 底部悬浮推广条
   —— 遵循百度《移动搜索落地页体验白皮书》：
      · 不出现在首屏，滚动 400px 后才滑入
      · 移动端高度 ≤ 屏幕 10%
      · 必须有明显关闭按钮
      · 标注“广告”字样（《互联网广告管理办法》要求）
      · 链接一律 rel="nofollow sponsored"，不传递权重
   ============================================================ */
.promo-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 999;
  background: linear-gradient(100deg, var(--green-deep) 0%, var(--green) 62%, #0d6b50 100%);
  color: #fff;
  border-top: 2px solid var(--lime);
  box-shadow: 0 -6px 24px rgba(7, 62, 49, .22);
  transform: translateY(110%);
  transition: transform .34s cubic-bezier(.22, .8, .3, 1);
  padding-bottom: env(safe-area-inset-bottom, 0px); /* iPhone 底部安全区 */
}
.promo-bar[data-state="shown"] { transform: translateY(0); }
.promo-inner {
  max-width: var(--shell);
  margin: 0 auto;
  min-height: 72px;
  padding: 10px clamp(14px, 3.4vw, 28px);
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 22px);
}
.promo-tag {
  flex: 0 0 auto;
  padding: 3px 6px;
  border: 1px solid rgba(255, 255, 255, .38);
  border-radius: 3px;
  color: rgba(255, 255, 255, .72);
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: .06em;
}
.promo-brand { flex: 0 0 auto; display: flex; align-items: center; gap: 11px; min-height: var(--tap); }
.promo-mark {
  flex: 0 0 auto;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: var(--lime);
  color: var(--green-deep);
  font: 800 20px/1 Georgia, serif;
}
.promo-text { display: grid; gap: 3px; }
.promo-text strong { font-size: clamp(14px, 1.2vw, 16px); font-weight: 800; letter-spacing: -.01em; white-space: nowrap; }
.promo-text em {
  font-style: normal;
  font-size: clamp(12px, 1vw, 13px);
  font-weight: 800;
  color: var(--lime);
  white-space: nowrap;
}
.promo-risk {
  flex: 1 1 auto;
  margin: 0;
  color: rgba(255, 255, 255, .55);
  font-size: var(--fs-mini);
  line-height: 1.5;
  text-align: center;
}
.promo-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.promo-btn {
  min-height: var(--tap);
  padding: 0 clamp(14px, 1.8vw, 22px);
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 5px;
  font-size: clamp(13px, 1vw, 14px);
  font-weight: 800;
  white-space: nowrap;
  transition: .2s ease;
}
.promo-btn.primary { background: var(--lime); color: var(--green-deep); }
.promo-btn.primary:hover { filter: brightness(1.07); transform: translateY(-1px); }
.promo-btn.ghost { border: 1px solid rgba(255, 255, 255, .5); color: #fff; }
.promo-btn.ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }
.promo-close {
  flex: 0 0 auto;
  width: 34px; height: 34px;
  margin-left: 2px;
  display: grid; place-items: center;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .32);
  border-radius: 50%;
  background: transparent;
  color: rgba(255, 255, 255, .82);
  font: 400 20px/1 sans-serif;
  cursor: pointer;
  transition: .2s ease;
}
.promo-close:hover { background: rgba(255, 255, 255, .16); color: #fff; }

.promo-btn .lbl-short { display: none; }

@media (max-width: 1024px) { .promo-risk { display: none; } .promo-actions { margin-left: auto; } }
@media (max-width: 620px) {
  .promo-inner { min-height: 62px; padding: 8px 12px; gap: 8px; }
  .promo-mark { width: 32px; height: 32px; border-radius: 7px; font-size: 17px; }
  .promo-brand { gap: 8px; min-height: 0; }
  .promo-text { gap: 2px; }
  .promo-text strong { font-size: 13px; }
  .promo-text em { font-size: 11.5px; }
  .promo-tag { padding: 1px 4px; font-size: 10px; letter-spacing: 0; }
  .promo-btn { min-height: 40px; padding: 0 12px; font-size: 12.5px; }
  .promo-actions { gap: 7px; }
  .promo-close { width: 30px; height: 30px; font-size: 18px; }
}
@media (max-width: 440px) {
  .promo-mark { display: none; }
  .promo-text strong { font-size: 12.5px; }
  .promo-btn { padding: 0 10px; font-size: 12px; }
  .promo-btn .lbl-full { display: none; }
  .promo-btn .lbl-short { display: inline; }
}
@media (max-width: 340px) {
  .promo-inner { padding: 8px 10px; gap: 6px; }
  .promo-tag { display: none; }   /* 极窄屏改由品牌行内的“广告”角标承担标注 */
  .promo-text strong::after { content: " · 广告"; color: rgba(255,255,255,.55); font-weight: 400; font-size: 10px; }
}
/* 横屏矮屏：进一步压缩，避免遮挡正文 */
@media (max-height: 460px) { .promo-inner { min-height: 52px; } .promo-btn { min-height: 36px; } }