/* ==========================================================================
   九九影院 · 全站样式
   依据已锁定的 DOM 结构编写，分 base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base · 变量与基础排版
   ========================================================================== */

:root {
  --color-page: #ffffff;
  --color-ink: #111111;
  --color-ink-soft: #3a3a3a;
  --color-ink-mute: #6b6b6b;
  --color-rule: #d9d9d9;
  --color-rule-soft: #ececec;
  --color-panel: #f5f5f5;
  --color-accent: #8a1f1f;

  --font-sans: "Helvetica Neue", Helvetica, Arial, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun",
    "Noto Serif SC", serif;

  --width-shell: 1120px;
  --gutter: 24px;
  --section-gap: 48px;
  --item-gap: 20px;
  --radius: 6px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

.site-body {
  margin: 0;
  padding: 0;
  background-color: var(--color-page);
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  line-height: 1.35;
}

p {
  margin: 0 0 1em;
}

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

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

a:hover,
a:focus-visible {
  color: #5f1414;
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==========================================================================
   layout · 全站骨架：页头、主导航、主容器、面包屑、页标题、页脚
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-page);
  border-bottom: 1px solid var(--color-rule);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.site-header.is-scrolled {
  background-color: var(--color-page);
  border-bottom-color: var(--color-ink);
}

.header-inner {
  max-width: var(--width-shell);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--color-ink);
  text-decoration: none;
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-ink);
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.2;
}

.brand-tagline {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-ink-mute);
  line-height: 1.3;
}

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  display: inline-block;
  padding: 6px 2px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom-color: var(--color-rule);
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

.site-main {
  display: block;
  max-width: var(--width-shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.home-main {
  padding-bottom: 0;
}

.inner-main {
  padding-top: 22px;
  padding-bottom: 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-ink-mute);
  margin-bottom: 22px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-accent);
}

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

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

.page-header {
  padding-bottom: 26px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--color-rule);
}

.page-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 14px;
}

.page-description,
.page-lead {
  max-width: 760px;
  font-size: 17px;
  color: var(--color-ink-soft);
}

.page-lead {
  margin-top: 8px;
}

.page-layout {
  display: block;
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.site-footer {
  margin-top: 64px;
  border-top: 1px solid var(--color-ink);
  background-color: var(--color-panel);
  color: var(--color-ink-soft);
  font-family: var(--font-sans);
}

.footer-inner {
  max-width: var(--width-shell);
  margin: 0 auto;
  padding: 44px var(--gutter) 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 40px;
  align-items: start;
}

.footer-brand {
  max-width: 340px;
}

.footer-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-ink-mute);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.footer-group-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-rule);
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-group a {
  font-size: 14px;
  color: var(--color-ink-soft);
}

.footer-group a:hover,
.footer-group a:focus-visible {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-rule);
  background-color: var(--color-page);
}

.footer-bottom p {
  max-width: var(--width-shell);
  margin: 0 auto;
  padding: 6px var(--gutter);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-mute);
}

.footer-note {
  padding-top: 18px;
}

.footer-copy {
  padding-bottom: 20px;
}

/* ==========================================================================
   components · 通用模块外壳
   ========================================================================== */

.section {
  padding: var(--section-gap) 0;
  border-top: 1px solid var(--color-rule-soft);
}

.section:first-child {
  border-top: none;
}

.section-head,
.section-header {
  margin-bottom: 28px;
}

.section-title {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-intro,
.section-lead,
.section-desc {
  max-width: 780px;
  font-size: 16px;
  color: var(--color-ink-soft);
}

.subsection-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.aside-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.text-link {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.text-link::after {
  content: " →";
  font-weight: 400;
}

.text-link:hover,
.text-link:focus-visible {
  color: #5f1414;
}

.section-next,
.section-note {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--color-rule-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-family: var(--font-sans);
  font-size: 15px;
}

.section-next a,
.section-note a {
  font-weight: 600;
}

.figure,
.media-figure,
.section-media,
.matrix-figure,
.process-figure,
.hero-figure {
  margin: 0;
}

.figure img,
.media-figure img,
.section-media img,
.matrix-figure img,
.process-figure img,
.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  background-color: var(--color-panel);
}

.figure figcaption,
.media-figure figcaption,
.media-caption,
.matrix-figure figcaption,
.process-figure figcaption,
.hero-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-ink-mute);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-item {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.check-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* 折叠问答：内页通用 */
.faq-group {
  margin-bottom: 36px;
}

.faq-group:last-child {
  margin-bottom: 0;
}

.faq-group-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-rule);
}

.faq-item {
  border-bottom: 1px solid var(--color-rule-soft);
}

.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 15px 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "+";
  flex: 0 0 auto;
  width: 18px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item[open] > .faq-question::before {
  content: "–";
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-answer {
  padding: 0 0 18px 28px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

.hero-section {
  padding: 52px 0 var(--section-gap);
  border-bottom: 1px solid var(--color-rule);
}

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

.hero-text {
  display: flex;
  flex-direction: column;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-ink-soft);
  margin-bottom: 12px;
}

.hero-note {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-ink-mute);
  margin-bottom: 22px;
}

.hero-entries {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: auto;
}

.hero-entries li {
  min-width: 0;
}

.entry-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 14px 14px 16px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
  color: var(--color-ink);
}

.entry-link:hover,
.entry-link:focus-visible {
  border-color: var(--color-ink);
  background-color: var(--color-panel);
  text-decoration: none;
}

.entry-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
}

.entry-desc {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.55;
  color: var(--color-ink-mute);
}

.hero-figure {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
}

.section-matrix .matrix-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

.matrix-list {
  border-top: 1px solid var(--color-rule);
}

.matrix-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-rule);
}

.matrix-name {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.matrix-body {
  min-width: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.matrix-audience,
.matrix-delivery {
  display: block;
}

.matrix-more {
  margin-top: 18px;
}

.matrix-aside {
  padding: 20px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-panel);
}

.aside-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.aside-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.process-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: none;
}

.process-step {
  padding: 18px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
}

.process-index {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.process-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.process-duty,
.process-output {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.process-output {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--color-rule-soft);
  color: var(--color-ink-mute);
}

.process-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--color-rule-soft);
}

.process-figure {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius);
}

.process-note-text p {
  font-size: 16px;
  color: var(--color-ink-soft);
}

.section-delivery .delivery-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: start;
}

.delivery-col {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
}

.delivery-col .subsection-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.delivery-more {
  margin-top: 20px;
}

.faq-preview-list {
  border-top: 1px solid var(--color-rule);
}

.faq-preview-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-rule);
}

.faq-preview-q {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.faq-preview-a {
  max-width: 820px;
  font-size: 16px;
  color: var(--color-ink-soft);
}

.faq-preview-more {
  margin-top: 18px;
}

.section-index .index-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.index-col {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.index-col:hover {
  border-color: var(--color-ink);
  background-color: var(--color-panel);
}

.index-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.index-name a {
  color: var(--color-ink);
}

.index-name a:hover,
.index-name a:focus-visible {
  color: var(--color-accent);
}

.index-desc {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-ink-mute);
}

/* ==========================================================================
   pages · 服务矩阵
   ========================================================================== */

.section-matrix-overview .matrix-figure {
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  margin-bottom: 28px;
}

.matrix-table {
  border-top: 1px solid var(--color-ink);
  font-size: 16px;
}

.matrix-caption {
  caption-side: top;
  text-align: left;
  padding: 10px 0 14px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-ink-mute);
}

.matrix-table th,
.matrix-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--color-rule);
  line-height: 1.7;
}

.matrix-table thead th {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  white-space: nowrap;
}

.matrix-table tbody th {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  width: 190px;
}

.matrix-table td {
  color: var(--color-ink-soft);
}

.service-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--color-rule);
}

.service-item:first-of-type {
  border-top: 1px solid var(--color-rule);
}

.service-item-title {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}

.service-item-text {
  max-width: 780px;
  font-size: 16px;
  color: var(--color-ink-soft);
  margin-bottom: 14px;
}

.service-meta {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 16px;
  margin: 0;
  font-size: 15px;
}

.service-meta dt {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-ink);
}

.service-meta dd {
  margin: 0;
  color: var(--color-ink-soft);
}

.section-matrix-combine .combine-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: start;
}

.combine-col {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
}

.combine-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.combine-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.combine-list li {
  position: relative;
  padding-left: 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.combine-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 1px;
  background-color: var(--color-accent);
}

.choose-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.choose-item {
  padding: 18px 20px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
}

.choose-item-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.choose-item p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ==========================================================================
   pages · 合作流程
   ========================================================================== */

.section-process-overview .media-figure-wide {
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  margin-bottom: 28px;
}

.process-track-item {
  padding: 18px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
}

.process-track-index {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.process-track-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-track-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.stage-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.stage-item {
  padding: 22px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
}

.stage-name {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.stage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin: 0;
}

.stage-cell {
  min-width: 0;
}

.stage-cell dt {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.stage-cell dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.section-process-stages .media-figure {
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  margin-top: 28px;
}

.prepare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: start;
}

.prepare-column {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
}

.prepare-column-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.prepare-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.prepare-item {
  position: relative;
  padding-left: 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.prepare-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 1px;
  background-color: var(--color-accent);
}

/* ==========================================================================
   pages · 交付标准
   ========================================================================== */

.delivery-points .points-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: start;
}

.points-column {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
}

.points-column-notes {
  background-color: var(--color-panel);
}

.column-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.note-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.note-item {
  position: relative;
  padding-left: 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.note-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 1px;
  background-color: var(--color-ink-mute);
}

.check-method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.method-item {
  padding: 20px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-page);
}

.method-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.method-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.method-meta {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-rule-soft);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-ink-mute);
}

.acceptance-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.acceptance-step {
  padding: 20px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-panel);
}

.step-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.section-media {
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  margin-top: 28px;
}

.condition-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.condition-item {
  padding: 18px 20px;
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-panel);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.condition-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.condition-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ==========================================================================
   pages · 常见问题
   ========================================================================== */

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

.content-side {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.side-block {
  padding: 20px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-panel);
}

.side-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-rule);
}

.side-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink-soft);
  margin-bottom: 14px;
}

.side-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.side-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.side-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.side-link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.side-link-list a {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
}

.side-figure {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
}

.faq-boundary {
  padding: 22px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  background-color: var(--color-panel);
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.boundary-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-rule);
}

.boundary-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.boundary-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  padding-top: 56px;
  padding-bottom: 56px;
}

.error-panel {
  max-width: 720px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-rule);
}

.error-code {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.error-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 14px;
}

.error-text {
  font-size: 17px;
  color: var(--color-ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-page);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: var(--color-panel);
  color: var(--color-ink);
}

.error-links {
  padding-top: 32px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.error-link-list a {
  display: block;
  min-height: 44px;
  padding: 14px 16px;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.error-link-list a:hover,
.error-link-list a:focus-visible {
  border-color: var(--color-ink);
  background-color: var(--color-panel);
  text-decoration: none;
}

/* ==========================================================================
   responsive · 平板与手机
   ========================================================================== */

@media (max-width: 1024px) {
  .layout-shell {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 28px;
  }

  .section-matrix .matrix-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 28px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 32px;
  }

  .error-link-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 18px;
    --section-gap: 36px;
    --item-gap: 16px;
  }

  .site-body {
    font-size: 16px;
  }

  .header-inner {
    min-height: 58px;
    padding: 12px var(--gutter);
  }

  .brand-name {
    font-size: 19px;
  }

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-page);
    border-bottom: 1px solid var(--color-ink);
  }

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

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

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

  .nav-link {
    display: block;
    min-height: 44px;
    padding: 12px 0;
    font-size: 16px;
    border-bottom: none;
  }

  .nav-link:hover,
  .nav-link:focus-visible {
    border-bottom-color: transparent;
  }

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

  .inner-main {
    padding-top: 18px;
    padding-bottom: 40px;
  }

  .breadcrumb {
    margin-bottom: 16px;
  }

  .page-header {
    padding-bottom: 20px;
    margin-bottom: 26px;
  }

  .page-title,
  .hero-title,
  .error-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 21px;
  }

  .subsection-title,
  .combine-title,
  .prepare-column-title,
  .column-title {
    font-size: 18px;
  }

  .page-description,
  .page-lead,
  .section-intro,
  .section-lead,
  .section-desc {
    font-size: 16px;
  }

  /* 首页 */
  .hero-section {
    padding-top: 32px;
    padding-bottom: 32px;
  }

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

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

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

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

  .matrix-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .process-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-note {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .section-delivery .delivery-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .section-index .index-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* 服务矩阵 */
  .matrix-table thead {
    display: none;
  }

  .matrix-table,
  .matrix-table tbody,
  .matrix-table tr,
  .matrix-table th,
  .matrix-table td {
    display: block;
    width: 100%;
  }

  .matrix-table tr {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-rule);
  }

  .matrix-table th,
  .matrix-table td {
    padding: 2px 0;
    border-bottom: none;
  }

  .matrix-table tbody th {
    font-size: 17px;
    margin-bottom: 4px;
  }

  .service-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .service-meta dd {
    margin-bottom: 8px;
  }

  .section-matrix-combine .combine-grid,
  .choose-list {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 合作流程 */
  .stage-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .prepare-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  /* 交付标准 */
  .delivery-points .points-columns,
  .check-method-grid,
  .condition-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  /* 常见问题 */
  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px var(--gutter) 24px;
  }

  .footer-brand {
    max-width: none;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-group a {
    display: inline-block;
    min-height: 32px;
    padding: 4px 0;
  }

  /* 404 */
  .error-main {
    padding-top: 40px;
    padding-bottom: 40px;
  }

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

@media (max-width: 480px) {
  .process-track {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .footer-nav {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .error-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}

/* ==========================================================================
   motion · 不阻塞阅读的轻量增强
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  .index-col,
  .entry-link,
  .choose-item,
  .method-item,
  .process-step,
  .process-track-item {
    transition: border-color 0.18s ease, background-color 0.18s ease,
      transform 0.18s ease;
  }

  .index-col:hover,
  .choose-item:hover,
  .method-item:hover,
  .process-step:hover,
  .process-track-item:hover {
    transform: translateY(-2px);
  }
}