/* ==========================================================================
   麻花影院 · growstyle.net
   全站样式表：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   1. base —— 变量、重置、排版基线
   ========================================================================== */

:root {
  --paper: #f5f2ea;
  --ink: #17181c;
  --ink-soft: #3a3f47;
  --signal: #b23a2f;
  --teal: #1d5c55;
  --rule: #d9d2c4;
  --surface: #ffffff;

  --font-sans: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, "Courier New", monospace;

  --shell-max: 1120px;
  --read-max: 720px;
  --pad-desktop: 32px;
  --pad-tablet: 24px;
  --pad-mobile: 18px;

  --header-h: 64px;
  --radius: 6px;
  --gap-block: 56px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
  max-width: 36em;
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

dl {
  margin: 0;
}

dt,
dd {
  margin: 0;
}

a {
  color: var(--ink);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--signal);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

table {
  border-collapse: collapse;
  width: 100%;
}

th,
td {
  text-align: left;
  vertical-align: top;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

hr {
  border: 0;
  height: 1px;
  background: var(--rule);
  margin: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   2. layout —— 骨架：跳转链接、页头、主导航、主容器、页脚
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  border-radius: var(--radius);
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
}

/* --- 页头 --- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--pad-desktop);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  min-height: 44px;
}

.brand-mark {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--ink);
}

.nav-link.is-current {
  color: var(--ink);
  font-weight: 700;
  border-bottom-color: var(--signal);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
}

/* --- 主容器 --- */

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--pad-desktop) var(--gap-block);
}

/* --- 面包屑 --- */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.breadcrumb a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

.breadcrumb a:hover {
  color: var(--signal);
}

.breadcrumb-sep {
  color: var(--rule);
}

.breadcrumb-current {
  color: var(--ink);
}

/* --- 内页标题区 --- */

.page-header {
  padding: 28px 0 0;
}

.page-title {
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.25;
  max-width: 22em;
}

/* --- 页脚 --- */

.site-footer {
  margin-top: 24px;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}

.footer-inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 48px var(--pad-desktop) 32px;
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) minmax(150px, 1fr) minmax(150px, 1fr) minmax(200px, 1.2fr);
  gap: 32px 40px;
  align-items: start;
}

.footer-logo {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  max-width: none;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 26em;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-list a:hover {
  color: var(--signal);
}

.footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.footer-note p {
  max-width: 30em;
}

.footer-bottom {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

/* ==========================================================================
   3. components —— 通用模块：眉题、标题、按钮、表格、编号、折叠、入口带
   ========================================================================== */

.eyebrow,
.section-eyebrow,
.module-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal);
  margin: 0 0 10px;
  max-width: none;
}

.section-title {
  font-size: 22px;
  line-height: 1.4;
  margin: 0 0 12px;
}

.section-head {
  margin-bottom: 24px;
}

.section-lead,
.section-desc,
.section-intro,
.module-intro {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 42em;
}

.section-foot {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  max-width: none;
}

.section-foot a,
.source-note a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

.section-foot a:hover,
.source-note a:hover {
  color: var(--signal);
}

.source-note {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  max-width: none;
}

/* --- 按钮 --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--paper);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}

.btn-ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* --- 数据表格 --- */

.table-wrap,
.table-scroll {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.data-table {
  min-width: 640px;
  font-size: 14px;
  line-height: 1.65;
}

.table-caption {
  caption-side: top;
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
}

.data-table thead th {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

.data-table tbody th,
.data-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody th {
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

/* --- 编号清单（首页摘录 / 准备清单 / 分层示意共用基类） --- */

.check-list,
.layer-list,
.step-list,
.flow-list,
.correction-list {
  display: flex;
  flex-direction: column;
}

.check-item,
.layer-item,
.step-item,
.flow-item,
.correction-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}

.check-num,
.layer-no,
.step-num,
.flow-num,
.correction-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--signal);
  padding-top: 2px;
}

.check-body,
.step-body,
.flow-body {
  min-width: 0;
}

.check-name,
.check-title,
.layer-title,
.step-title,
.flow-title {
  font-size: 16px;
  margin: 0 0 4px;
}

.check-desc,
.layer-text,
.step-body p,
.flow-line {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 42em;
}

/* --- 折叠问答（首页 FAQ / 常见问题页） --- */

.faq-list,
.qa-group {
  max-width: var(--read-max);
}

.faq-item,
.qa-item {
  border-top: 1px solid var(--rule);
}

.faq-item:last-child,
.qa-item:last-child {
  border-bottom: 1px solid var(--rule);
}

.faq-question,
.qa-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq-question::-webkit-details-marker,
.qa-question::-webkit-details-marker {
  display: none;
}

.faq-question::after,
.qa-question::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--signal);
}

.faq-item[open] .faq-question::after,
.qa-item[open] .qa-question::after {
  content: "−";
}

.faq-answer,
.qa-answer {
  padding: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.faq-answer p,
.qa-answer p {
  max-width: 42em;
}

.qa-conclusion {
  color: var(--ink);
  font-weight: 600;
}

.qa-source {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.qa-source a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

/* --- 相关入口带 --- */

.related-band,
.related-strip {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.related-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.related-links,
.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.related-link,
.related-list a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 44px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: border-color 0.15s ease;
}

.related-link:hover,
.related-list a:hover {
  border-color: var(--ink);
}

.related-label,
.related-link-title,
.next-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.related-desc,
.related-link-desc,
.related-text,
.related-note {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.related-item {
  display: flex;
  flex-direction: column;
}

/* --- 内容配图 --- */

.content-figure,
.lead-figure,
.theme-figure,
.method-figure,
.qa-figure,
.annotation-figure {
  margin: 32px 0 0;
  max-width: 100%;
}

.content-figure img,
.lead-figure img,
.theme-figure img,
.method-figure img,
.qa-figure img,
.annotation-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--rule);
  border-radius: var(--radius);
}

/* ==========================================================================
   4. pages —— 各页面内部业务模块（不覆盖骨架）
   ========================================================================== */

/* --- 首页 --- */

.home-main {
  padding-bottom: var(--gap-block);
}

/* 编辑台首屏 */

.hero {
  border-bottom: 1px solid var(--rule);
}

.hero-inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 48px var(--pad-desktop) 56px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.hero-text {
  min-width: 0;
}

.hero-text h1 {
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.25;
  margin: 0 0 18px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 34em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 28px;
}

.hero-duties {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.hero-duties li {
  padding: 12px 0 12px 20px;
  border-bottom: 1px solid var(--rule);
  position: relative;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.hero-duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 1px;
  background: var(--signal);
}

.hero-media {
  margin: 0;
  min-width: 0;
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--rule);
  border-radius: var(--radius);
}

/* 分段结论条 */

.verdict-bar {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 48px var(--pad-desktop) 0;
}

.verdict-bar .section-title {
  margin-bottom: 20px;
}

.verdict-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.verdict-item {
  padding: 20px 24px 20px 0;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.verdict-item + .verdict-item {
  padding-left: 24px;
  border-left: 1px solid var(--rule);
}

.verdict-text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  max-width: none;
}

.verdict-mark {
  color: var(--signal);
  font-weight: 700;
  margin-right: 6px;
}

.verdict-source {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  max-width: none;
}

.verdict-source a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

.verdict-source a:hover {
  color: var(--signal);
}

/* 频道分层总表 */

.channel-table-section,
.theme-section,
.prep-section,
.annotation-section,
.method-section,
.faq-section,
.next-section {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 56px var(--pad-desktop) 0;
}

.channel-table .cell-channel {
  font-weight: 700;
  color: var(--ink);
}

/* 专题构成拆解 */

.theme-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(240px, 1fr);
  gap: 40px;
  align-items: start;
}

.theme-main {
  min-width: 0;
}

.theme-block {
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}

.theme-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.block-title {
  font-size: 17px;
  margin: 0 0 8px;
}

.theme-block p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.theme-figure {
  margin-top: 24px;
}

.theme-aside {
  min-width: 0;
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.aside-title {
  font-size: 15px;
  margin: 0 0 14px;
}

.field-list {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  gap: 10px 14px;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}

.field-list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--teal);
  padding-top: 2px;
}

.field-list dd {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.aside-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.aside-note a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

.aside-note a:hover {
  color: var(--signal);
}

/* 标注示例块 */

.annotation-demo {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.annotation-cell {
  padding: 20px 22px;
  min-width: 0;
}

.annotation-cell + .annotation-cell {
  border-left: 1px solid var(--rule);
}

.annotation-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 8px;
  max-width: none;
}

.annotation-value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  max-width: none;
}

.annotation-read {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 46em;
}

/* 整理方法三栏 */

.method-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.method-col {
  padding: 20px 24px 20px 0;
  min-width: 0;
}

.method-col + .method-col {
  padding-left: 24px;
  border-left: 1px solid var(--rule);
}

.method-col .block-title {
  font-size: 16px;
}

.method-col p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.method-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.method-link a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

.method-link a:hover {
  color: var(--signal);
}

/* 下一步入口 */

.next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.next-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 44px;
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: border-color 0.15s ease;
}

.next-link:hover {
  border-color: var(--ink);
}

.next-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* --- 频道分层页 --- */

.page-title-area {
  padding: 20px 0 0;
}

.page-title-area .page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
  margin-top: 14px;
}

.page-title-area .rule,
.rule {
  margin-top: 24px;
}

.content-section {
  padding: 40px 0 0;
}

.content-section .section-head {
  margin-bottom: 20px;
}

.table-scroll .channel-table {
  min-width: 680px;
}

.layer-list {
  max-width: var(--read-max);
}

.layer-item {
  grid-template-columns: 56px minmax(0, 1fr);
}

.layer-title {
  grid-column: 2;
}

.layer-text {
  grid-column: 2;
}

.layer-no {
  grid-row: 1 / span 2;
}

.compare-group {
  border-top: 1px solid var(--rule);
  padding: 20px 0;
}

.compare-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.compare-side {
  min-width: 0;
}

.compare-name {
  font-size: 15px;
  margin: 0 0 6px;
  color: var(--ink);
}

.compare-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.compare-note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  max-width: none;
}

.conclusion-block {
  padding-top: 40px;
}

.conclusion-line {
  border-left: 3px solid var(--signal);
  padding: 4px 0 4px 18px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 40em;
}

.conclusion-mark {
  color: var(--signal);
  font-weight: 700;
  margin-right: 6px;
}

.related-strip .related-links {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* --- 专题构成页 --- */

.page-hero {
  padding: 20px 0 0;
}

.page-hero .page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
}

.page-hero .rule {
  margin-top: 24px;
}

.section {
  padding: 40px 0 0;
}

.lead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.lead-text {
  min-width: 0;
}

.lead-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.lead-figure {
  margin: 0;
  min-width: 0;
}

.step-list {
  max-width: var(--read-max);
}

.step-item {
  grid-template-columns: 56px minmax(0, 1fr);
}

.step-num {
  grid-row: 1 / span 2;
}

.step-title {
  grid-column: 2;
}

.step-body {
  grid-column: 2;
}

.cross-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.cross-col {
  padding: 20px 24px 20px 0;
  min-width: 0;
}

.cross-col + .cross-col {
  padding-left: 24px;
  border-left: 1px solid var(--rule);
}

.cross-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.cross-col p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.section-conclusion .section-title {
  margin-bottom: 14px;
}

.section-conclusion p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42em;
}

.mark-conclusion {
  color: var(--signal);
  font-weight: 700;
  margin-right: 6px;
}

.section-related .related-band {
  margin-top: 24px;
}

/* --- 准备清单页 --- */

.page-layout {
  display: block;
  padding-top: 20px;
}

.page-title-block {
  min-width: 0;
}

.page-title-block .page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
  margin-top: 12px;
}

.rule-line {
  margin: 24px 0 0;
}

.page-layout .content-section {
  padding-top: 32px;
}

.page-layout .content-section h2 {
  font-size: 20px;
  margin-bottom: 10px;
}

.page-layout .content-section .section-intro {
  margin-bottom: 18px;
}

.check-list {
  max-width: var(--read-max);
}

.check-item {
  grid-template-columns: 56px minmax(0, 1fr);
}

.check-num {
  grid-row: 1 / span 2;
}

.check-title {
  grid-column: 2;
}

.check-body p {
  grid-column: 2;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.note-card {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  min-width: 0;
}

.note-title {
  font-size: 15px;
  margin: 0 0 6px;
}

.note-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.resume-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.resume-item {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  min-width: 0;
}

.resume-title {
  font-size: 15px;
  margin: 0 0 6px;
}

.resume-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-layout .related-band {
  margin-top: 36px;
}

/* --- 标注口径页 --- */

.page-container {
  display: block;
  padding-top: 20px;
}

.page-container .page-title {
  margin-bottom: 0;
}

.page-container .page-title .eyebrow {
  margin-bottom: 10px;
}

.page-container .page-title .page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
  margin-top: 12px;
}

.title-rule {
  display: block;
  margin-top: 24px;
  border: 0;
  height: 1px;
  background: var(--rule);
}

.page-container .content-section {
  padding-top: 36px;
}

.page-container .content-section .section-head {
  margin-bottom: 18px;
}

.page-container .data-table {
  min-width: 0;
  table-layout: fixed;
}

.page-container .data-table th,
.page-container .data-table td {
  padding: 14px 16px;
}

.page-container .data-table thead th:first-child,
.page-container .data-table tbody th {
  width: 22%;
}

.page-container .data-table thead th:nth-child(2) {
  width: 40%;
}

.page-container .data-table thead th:nth-child(3) {
  width: 38%;
}

.page-container .data-table tbody th {
  white-space: normal;
}

.field-name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.page-container .content-section .step-list {
  max-width: var(--read-max);
}

.page-container .content-section .step-item {
  grid-template-columns: 56px minmax(0, 1fr);
}

.page-container .content-section .step-num {
  grid-row: 1 / span 2;
}

.page-container .content-section .step-title {
  grid-column: 2;
}

.page-container .content-section .step-body {
  grid-column: 2;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.limit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: var(--read-max);
}

.limit-item {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  min-width: 0;
}

.limit-title {
  font-size: 15px;
  margin: 0 0 6px;
}

.limit-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.mark-red {
  color: var(--signal);
  font-weight: 700;
}

.mark-teal {
  color: var(--teal);
  font-weight: 700;
}

.page-container .section-conclusion {
  padding-top: 36px;
  border-top: 1px solid var(--rule);
  margin-top: 36px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42em;
}

.page-container .related-band {
  margin-top: 36px;
}

/* --- 整理方法页 --- */

.page-layout .page-title {
  margin-bottom: 0;
}

.page-layout .page-title .eyebrow {
  margin-bottom: 10px;
}

.page-layout .lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
  margin-top: 12px;
}

.page-layout .title-rule {
  display: block;
  margin-top: 24px;
  height: 1px;
  background: var(--rule);
}

.module {
  padding-top: 40px;
}

.module-head {
  margin-bottom: 20px;
}

.module-head h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.flow-list {
  max-width: var(--read-max);
}

.flow-item {
  grid-template-columns: 56px minmax(0, 1fr);
}

.flow-num {
  grid-row: 1 / span 4;
}

.flow-title {
  grid-column: 2;
}

.flow-body {
  grid-column: 2;
}

.flow-line {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 42em;
}

.flow-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--teal);
}

.figure-block {
  margin: 32px 0 0;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.principle-item {
  padding: 20px 24px 20px 0;
  min-width: 0;
}

.principle-item + .principle-item {
  padding-left: 24px;
  border-left: 1px solid var(--rule);
}

.principle-title {
  font-size: 16px;
  margin: 0 0 8px;
}

.principle-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.boundary-list {
  max-width: var(--read-max);
  border-top: 1px solid var(--rule);
}

.boundary-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.boundary-title {
  font-size: 15px;
  margin: 0 0 4px;
  color: var(--ink);
}

.boundary-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.correction-list {
  max-width: var(--read-max);
}

.correction-item {
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: start;
}

.correction-item p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 42em;
}

.method-flow + .figure-block,
.method-figure {
  margin-top: 32px;
}

.page-layout .section-conclusion {
  margin-top: 40px;
  padding: 18px 0 18px 18px;
  border-left: 3px solid var(--signal);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 42em;
}

.page-layout .related-band {
  margin-top: 36px;
}

.page-layout .related-band .related-link {
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
}

/* --- 常见问题页 --- */

.page-head {
  padding: 20px 0 0;
}

.page-head .page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
}

.content-column {
  padding-top: 36px;
}

.qa-group {
  max-width: var(--read-max);
}

.qa-group + .qa-group {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
}

.qa-group .section-title {
  margin-bottom: 8px;
}

.qa-group .section-intro {
  margin-bottom: 16px;
}

.qa-figure {
  margin-top: 32px;
}

.content-column .related-band {
  margin-top: 40px;
}

.content-column .related-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.content-column .related-item a {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.content-column .related-item a:hover {
  color: var(--signal);
}

/* --- 404 --- */

.error-main {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.error-inner {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 72px var(--pad-desktop) var(--gap-block);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--signal);
  margin-bottom: 12px;
  max-width: none;
}

.error-inner h1 {
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.25;
  margin-bottom: 16px;
  max-width: 20em;
}

.error-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 38em;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 36px;
}

.error-guide {
  max-width: var(--read-max);
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.error-guide h2 {
  font-size: 18px;
  margin-bottom: 14px;
}

.error-list {
  display: flex;
  flex-direction: column;
}

.error-list li {
  border-bottom: 1px solid var(--rule);
}

.error-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 15px;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

.error-list a:hover {
  color: var(--signal);
}

.error-note {
  margin-top: 28px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 40em;
}

/* ==========================================================================
   5. responsive —— 1120 / 860 / 560 断点
   ========================================================================== */

@media (max-width: 1120px) {
  .header-inner,
  .hero-inner,
  .verdict-bar,
  .channel-table-section,
  .theme-section,
  .prep-section,
  .annotation-section,
  .method-section,
  .faq-section,
  .next-section,
  .inner-main,
  .footer-inner,
  .error-inner {
    padding-left: var(--pad-tablet);
    padding-right: var(--pad-tablet);
  }

  .hero-inner {
    gap: 36px;
  }

  .theme-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(220px, 1fr);
    gap: 32px;
  }

  .footer-inner {
    grid-template-columns: minmax(220px, 1.4fr) minmax(140px, 1fr) minmax(140px, 1fr);
  }

  .footer-note {
    grid-column: 1 / -1;
    padding-top: 20px;
    border-top: 1px solid var(--rule);
  }
}

@media (max-width: 860px) {
  :root {
    --header-h: 60px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--pad-tablet) 16px;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-link {
    min-height: 48px;
    padding: 0 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--rule);
  }

  .nav-link.is-current {
    border-bottom-color: var(--rule);
    color: var(--signal);
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 36px;
    padding-bottom: 40px;
  }

  .hero-media img {
    aspect-ratio: 16 / 10;
  }

  .verdict-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .verdict-item {
    padding: 18px 0;
  }

  .verdict-item + .verdict-item {
    padding-left: 0;
    border-left: 0;
  }

  .theme-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .method-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .method-col {
    padding: 18px 0;
    border-top: 1px solid var(--rule);
  }

  .method-col + .method-col {
    padding-left: 0;
    border-left: 0;
  }

  .annotation-demo {
    grid-template-columns: minmax(0, 1fr);
  }

  .annotation-cell + .annotation-cell {
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .lead-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .cross-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cross-col {
    padding: 18px 0;
  }

  .cross-col + .cross-col {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .note-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .principle-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .principle-item {
    padding: 18px 0;
  }

  .principle-item + .principle-item {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .compare-pair {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .content-column .related-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
    padding-top: 40px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-note {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .header-inner,
  .hero-inner,
  .verdict-bar,
  .channel-table-section,
  .theme-section,
  .prep-section,
  .annotation-section,
  .method-section,
  .faq-section,
  .next-section,
  .inner-main,
  .footer-inner,
  .error-inner {
    padding-left: var(--pad-mobile);
    padding-right: var(--pad-mobile);
  }

  .brand-sub {
    display: none;
  }

  .nav-list {
    padding-left: var(--pad-mobile);
    padding-right: var(--pad-mobile);
  }

  .hero-inner {
    padding-top: 28px;
    padding-bottom: 32px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .verdict-bar,
  .channel-table-section,
  .theme-section,
  .prep-section,
  .annotation-section,
  .method-section,
  .faq-section,
  .next-section {
    padding-top: 40px;
  }

  .section-title {
    font-size: 20px;
  }

  .next-links,
  .related-links,
  .related-list,
  .resume-grid,
  .limit-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .data-table {
    min-width: 560px;
    font-size: 13px;
  }

  .data-table thead th,
  .data-table tbody th,
  .data-table tbody td {
    padding: 12px 12px;
  }

  .check-item,
  .layer-item,
  .step-item,
  .flow-item,
  .correction-item,
  .page-container .content-section .step-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .annotation-cell {
    padding: 16px 18px;
  }

  .theme-aside {
    padding: 18px 18px;
  }

  .field-list {
    grid-template-columns: minmax(64px, auto) minmax(0, 1fr);
  }

  .page-container .data-table {
    min-width: 0;
    table-layout: auto;
  }

  .page-container .data-table thead th,
  .page-container .data-table tbody th,
  .page-container .data-table tbody td {
    width: auto;
    white-space: normal;
  }

  .error-inner {
    padding-top: 48px;
  }

  .error-actions .btn {
    flex: 1 1 auto;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .footer-brand,
  .footer-note {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}