/* ==========================================================================
   囧次元 · 通用型企业官网 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --c-bg: #f6f7f5;
  --c-surface: #ffffff;
  --c-ink: #1f2421;
  --c-ink-soft: #5c635e;
  --c-primary: #2f6f63;
  --c-primary-soft: #e2efeb;
  --c-line: #d8dcd6;
  --c-line-strong: #b9c0ba;

  --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei",
    system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  --w-shell: 1140px;
  --w-text: 720px;
  --radius: 6px;
  --radius-sm: 4px;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
}

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--c-ink);
}

p {
  margin: 0;
}

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

a {
  color: var(--c-primary);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

button {
  font: inherit;
  color: inherit;
}

strong {
  font-weight: 600;
}

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */

.site-body {
  display: block;
  min-height: 100vh;
  background-color: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--c-ink);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
}

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

.site-nav {
  display: block;
}

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

.nav-list > li {
  display: block;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  color: var(--c-ink-soft);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--c-primary);
  background-color: var(--c-primary-soft);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--c-primary);
  font-weight: 600;
  background-color: var(--c-primary-soft);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background-color: var(--c-surface);
  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(--c-ink);
  border-radius: 1px;
}

.nav-toggle:hover,
.nav-toggle:focus {
  border-color: var(--c-primary);
}

.site-main {
  display: block;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main {
  padding-top: 20px;
}

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */

.section-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--c-ink);
}

.section-desc,
.section-intro,
.section-lead {
  margin-top: 10px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.section-more {
  margin-top: var(--sp-5);
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--c-primary);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.text-link:hover,
.text-link:focus {
  border-bottom-color: var(--c-primary);
  text-decoration: none;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding: 14px 0 0;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.breadcrumb a {
  color: var(--c-ink-soft);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus {
  color: var(--c-primary);
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--c-line-strong);
}

.breadcrumb-current {
  color: var(--c-ink);
  font-weight: 500;
}

/* 内页页面标题区 */
.page-header {
  padding: 24px 0 28px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: var(--sp-7);
}

.page-description {
  display: inline-block;
  padding: 3px 10px;
  margin-bottom: 12px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-ink);
}

.page-lead,
.page-intro {
  margin-top: 14px;
  max-width: var(--w-text);
  color: var(--c-ink-soft);
  font-size: 16px;
  line-height: 1.85;
}

/* 图片容器 */
.section-media,
.section-figure,
.media-figure {
  margin: var(--sp-6) 0 0;
}

.section-media img,
.section-figure img,
.media-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-primary-soft);
}

.section-media figcaption,
.section-figure figcaption,
.media-figure figcaption,
.figure-caption,
.media-caption {
  margin-top: 10px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* 折叠问答（首页 + 问题解答页共用） */
.faq-list {
  display: block;
  margin-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.faq-item {
  border-bottom: 1px solid var(--c-line);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  min-height: 56px;
  padding: 14px 4px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  list-style: none;
}

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

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

.faq-question-text {
  flex: 1 1 auto;
}

.faq-toggle-text {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink-soft);
}

.faq-answer {
  padding: 0 4px 18px;
  max-width: var(--w-text);
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.faq-answer p + p {
  margin-top: 10px;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.fact-bar {
  background-color: var(--c-primary-soft);
  border-bottom: 1px solid var(--c-line);
}

.fact-bar-text,
.fact-bar-hint {
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-primary);
}

.fact-bar-text {
  padding-bottom: 0;
  font-weight: 600;
}

.fact-bar-hint {
  padding-top: 2px;
  padding-bottom: 10px;
  color: var(--c-ink-soft);
}

.home-main {
  padding-top: var(--sp-7);
}

/* 首屏 */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: var(--sp-7);
  align-items: center;
  padding-bottom: var(--sp-7);
  border-bottom: 1px solid var(--c-line);
}

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

.hero-tag {
  display: inline-block;
  padding: 3px 10px;
  margin-bottom: 16px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}

.hero-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.28;
  color: var(--c-ink);
}

.hero-lead {
  margin-top: 18px;
  max-width: 560px;
  color: var(--c-ink-soft);
  font-size: 17px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--c-primary);
  color: #ffffff;
  border: 1px solid var(--c-primary);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: #255a50;
  border-color: #255a50;
  color: #ffffff;
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--c-primary);
  border: 1px solid var(--c-line-strong);
}

.btn-ghost:hover,
.btn-ghost:focus {
  background-color: var(--c-primary-soft);
  border-color: var(--c-primary);
  color: var(--c-primary);
  text-decoration: none;
}

.hero-media {
  margin: 0;
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-primary-soft);
}

.hero-media figcaption {
  margin-top: 10px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* 模块通用间距 */
.directions,
.process-preview,
.delivery-preview,
.faq-preview,
.column-index {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.column-index {
  border-bottom: 0;
  padding-bottom: 0;
}

.section-head {
  max-width: var(--w-text);
}

/* 服务方向索引 */
.direction-list {
  margin-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.direction-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: var(--sp-4);
  padding: 20px 4px;
  border-bottom: 1px solid var(--c-line);
  transition: background-color 0.18s ease;
}

.direction-item:hover {
  background-color: #fbfcfb;
}

.direction-no {
  display: block;
  padding-top: 3px;
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.direction-body {
  min-width: 0;
}

.direction-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
}

.direction-summary {
  margin-top: 8px;
  max-width: var(--w-text);
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.direction-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 4px;
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.direction-link:hover,
.direction-link:focus {
  text-decoration: underline;
}

/* 合作流程四阶段预览 */
.stage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.stage-item {
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.stage-no {
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.stage-name {
  font-size: 16px;
  font-weight: 600;
}

.stage-prep {
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.stage-node {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-primary);
  font-size: 13px;
  line-height: 1.7;
}

/* 交付范围与验收标准摘要 */
.delivery-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-5);
  margin-top: var(--sp-5);
}

.delivery-col {
  padding: 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.col-title {
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
  font-size: 16px;
  font-weight: 600;
}

.col-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 10px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.col-list li:last-child {
  margin-bottom: 0;
}

.col-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--c-primary);
  border-radius: 50%;
}

/* 站内栏目索引 */
.column-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.column-item {
  min-width: 0;
}

.column-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.column-link:hover,
.column-link:focus {
  border-color: var(--c-primary);
  background-color: var(--c-primary-soft);
  text-decoration: none;
}

.column-name {
  color: var(--c-ink);
  font-size: 16px;
  font-weight: 600;
}

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

/* --------------------------------------------------------------------------
   pages · 服务方向页
   -------------------------------------------------------------------------- */

.directions-section .section-lead {
  max-width: var(--w-text);
}

.direction-item.direction-item {
  margin-top: var(--sp-5);
  padding: 22px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  gap: var(--sp-5);
  align-items: start;
}

.direction-item .direction-head {
  min-width: 0;
}

.direction-item .direction-no {
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.direction-item .direction-name {
  margin-top: 6px;
  font-size: 19px;
  font-weight: 600;
}

.direction-item .direction-body {
  min-width: 0;
}

.direction-item .direction-work,
.direction-item .direction-audience,
.direction-item .direction-exclude {
  margin-bottom: 12px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.direction-item .direction-exclude {
  margin-bottom: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
}

.field-label {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 8px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  vertical-align: 1px;
}

/* 适配判断核对顺序 */
.check-order-section {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.check-order-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.check-order-item {
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--radius);
  min-width: 0;
}

.check-order-name {
  font-size: 16px;
  font-weight: 600;
}

.check-order-desc {
  margin-top: 8px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

/* 方向差异提示 */
.direction-diff-section {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.diff-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.diff-item {
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.diff-name {
  font-size: 16px;
  font-weight: 600;
}

.diff-desc {
  margin-top: 8px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

/* 方向与流程衔接 */
.direction-next-section {
  padding: var(--sp-7) 0 0;
}

.direction-next-desc {
  margin-top: var(--sp-5);
  max-width: var(--w-text);
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.9;
}

.direction-next-desc a {
  color: var(--c-primary);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 合作流程页
   -------------------------------------------------------------------------- */

.stages-section .section-intro {
  max-width: var(--w-text);
}

.stage-item.stage-item {
  margin-top: var(--sp-5);
  padding: 22px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.stage-item .stage-head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}

.stage-item .stage-num {
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.stage-item .stage-name {
  font-size: 19px;
  font-weight: 600;
}

.stage-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-5);
  align-items: start;
}

.stage-body .stage-col {
  min-width: 0;
}

.stage-body .stage-col-title {
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0.04em;
}

.stage-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.stage-list li:last-child {
  margin-bottom: 0;
}

.stage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--c-primary);
  border-radius: 50%;
}

.stage-body .stage-node {
  grid-column: 1 / -1;
  margin-top: var(--sp-2);
  padding-top: 14px;
  border-top: 1px dashed var(--c-line);
}

.stage-node-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
}

.stage-node p {
  margin-top: 6px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

/* 反馈机制 */
.feedback-section {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.feedback-section .section-intro {
  max-width: var(--w-text);
}

.feedback-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.feedback-item {
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.feedback-name {
  font-size: 16px;
  font-weight: 600;
}

.feedback-item p {
  margin-top: 8px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

/* 阶段衔接 */
.transition-section {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.transition-body {
  margin-top: var(--sp-5);
  max-width: var(--w-text);
}

.transition-body p {
  margin-bottom: 14px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.9;
}

.transition-body p:last-child {
  margin-bottom: 0;
}

/* 前置条件 */
.prereq-section {
  padding: var(--sp-7) 0 0;
}

.prereq-section .section-intro {
  max-width: var(--w-text);
}

.prereq-list {
  margin-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.prereq-item {
  display: grid;
  grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
  gap: var(--sp-4);
  padding: 14px 4px;
  border-bottom: 1px solid var(--c-line);
  align-items: baseline;
}

.prereq-stage {
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 600;
}

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

/* 相关页面 */
.related-links {
  margin-top: var(--sp-6);
  padding: 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.related-label {
  margin-bottom: 12px;
  color: var(--c-ink);
  font-size: 14px;
  font-weight: 600;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-3);
}

.related-list li {
  min-width: 0;
}

.related-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.related-list a:hover,
.related-list a:focus {
  background-color: var(--c-primary);
  color: #ffffff;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 交付范围页
   -------------------------------------------------------------------------- */

.delivery-items .section-intro,
.acceptance-standards .section-intro,
.out-of-scope .section-intro,
.stage-mapping .section-intro {
  max-width: var(--w-text);
}

.delivery-item {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-5);
  padding: 22px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  align-items: start;
}

.delivery-item-head {
  min-width: 0;
}

.item-index {
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.item-name {
  margin-top: 6px;
  font-size: 19px;
  font-weight: 600;
}

.item-form {
  margin-top: 10px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.delivery-item-body {
  min-width: 0;
  padding-left: var(--sp-5);
  border-left: 1px solid var(--c-line);
}

.item-method-label {
  display: inline-block;
  margin-bottom: 8px;
  padding: 1px 8px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.item-method {
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.item-method a {
  color: var(--c-primary);
  font-weight: 600;
}

/* 验收标准 */
.acceptance-standards {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.standard-list {
  margin-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.standard-item {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: var(--sp-4);
  padding: 18px 4px;
  border-bottom: 1px solid var(--c-line);
  align-items: start;
}

.standard-name {
  font-size: 16px;
  font-weight: 600;
}

.standard-check {
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.standard-way {
  grid-column: 2 / 3;
  margin-top: 6px;
  color: var(--c-primary);
  font-size: 14px;
  line-height: 1.8;
}

/* 范围外事项 */
.out-of-scope {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.scope-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.scope-item {
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.scope-name {
  font-size: 16px;
  font-weight: 600;
}

.scope-reason {
  margin-top: 8px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

/* 交付与阶段对应 */
.stage-mapping {
  padding: var(--sp-7) 0 0;
}

.mapping-list {
  margin-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.mapping-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(160px, 220px);
  gap: var(--sp-4);
  padding: 14px 4px;
  border-bottom: 1px solid var(--c-line);
  align-items: baseline;
}

.mapping-item-name {
  color: var(--c-ink);
  font-size: 15px;
  font-weight: 600;
}

.mapping-stage {
  color: var(--c-primary);
  font-size: 14px;
  text-align: right;
}

.section-next {
  margin-top: var(--sp-5);
}

.section-next a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--c-primary);
  font-size: 15px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 问题解答页
   -------------------------------------------------------------------------- */

.faq-overview {
  padding-bottom: var(--sp-7);
  border-bottom: 1px solid var(--c-line);
}

.faq-overview .section-desc {
  max-width: var(--w-text);
}

.faq-category-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.faq-category-item {
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.category-index {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.category-name {
  font-size: 16px;
  font-weight: 600;
}

.category-desc {
  margin-top: 8px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.category-desc a {
  color: var(--c-primary);
  font-weight: 600;
}

.faq-group {
  padding: var(--sp-6) 0;
  border-bottom: 1px solid var(--c-line);
}

.faq-group .section-desc {
  max-width: var(--w-text);
}

.faq-group .faq-list {
  margin-top: var(--sp-5);
}

/* 沟通前准备清单 */
.checklist-section {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--c-line);
}

.checklist-section .section-desc {
  max-width: var(--w-text);
}

.checklist-list {
  margin-top: var(--sp-5);
  border-top: 1px solid var(--c-line);
}

.checklist-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--sp-4);
  padding: 16px 4px;
  border-bottom: 1px solid var(--c-line);
  align-items: start;
}

.checklist-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
}

.checklist-body {
  min-width: 0;
}

.checklist-name {
  font-size: 16px;
  font-weight: 600;
}

.checklist-usage {
  margin-top: 6px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

/* 后续路径 */
.next-step-section {
  padding: var(--sp-7) 0 0;
}

.next-step-section .section-desc {
  max-width: var(--w-text);
}

.next-step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.next-step-card {
  display: flex;
  flex-direction: column;
  padding: 20px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.next-step-name {
  font-size: 16px;
  font-weight: 600;
}

.next-step-desc {
  margin-top: 8px;
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.next-step-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  padding-top: 8px;
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.next-step-link:hover,
.next-step-link:focus {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding-top: var(--sp-7);
  padding-bottom: var(--sp-8);
}

.error-panel {
  width: 100%;
  max-width: 640px;
  padding: 40px 32px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-align: center;
}

.error-code {
  color: var(--c-primary);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
}

.error-panel h1 {
  margin-top: 16px;
  font-size: 24px;
  font-weight: 600;
}

.error-text {
  margin-top: 12px;
  color: var(--c-ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.error-action-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  background-color: var(--c-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.error-action-primary:hover,
.error-action-primary:focus {
  background-color: #255a50;
  color: #ffffff;
  text-decoration: none;
}

.error-action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--c-line-strong);
  color: var(--c-primary);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.error-action-link:hover,
.error-action-link:focus {
  background-color: var(--c-primary-soft);
  border-color: var(--c-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   layout · 页脚
   -------------------------------------------------------------------------- */

.site-footer {
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-line);
  color: var(--c-ink-soft);
}

.footer-inner {
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

.footer-about {
  max-width: var(--w-text);
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink-soft);
  font-size: 14px;
  line-height: 1.85;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-5);
}

.footer-group {
  min-width: 0;
}

.footer-group-title {
  margin-bottom: 12px;
  color: var(--c-ink);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.footer-list li {
  margin-bottom: 6px;
}

.footer-list li:last-child {
  margin-bottom: 0;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--c-ink-soft);
  font-size: 14px;
  text-decoration: none;
}

.footer-list a:hover,
.footer-list a:focus {
  color: var(--c-primary);
  text-decoration: underline;
}

.footer-copy {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--c-line);
  color: var(--c-ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1000px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: var(--sp-6);
  }

  .stage-grid,
  .check-order-list,
  .related-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .standard-way {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 10px 20px;
    min-height: 0;
    row-gap: 0;
  }

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

  .site-nav {
    flex: 1 1 100%;
    width: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--c-line);
    margin-top: 10px;
  }

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

  .nav-list > li {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: 0 12px;
    border-radius: var(--radius-sm);
  }

  .site-main {
    padding: 0 20px 56px;
  }

  .fact-bar-text,
  .fact-bar-hint {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-5);
  }

  .hero-media {
    order: -1;
  }

  .hero-title {
    font-size: 30px;
  }

  .stage-grid,
  .delivery-columns,
  .check-order-list,
  .diff-list,
  .feedback-list,
  .scope-list,
  .faq-category-list,
  .next-step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .direction-item.direction-item,
  .delivery-item {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-4);
  }

  .delivery-item-body {
    padding-left: 0;
    padding-top: var(--sp-4);
    border-left: 0;
    border-top: 1px solid var(--c-line);
  }

  .stage-body {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-4);
  }

  .prereq-item,
  .mapping-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .mapping-stage {
    text-align: left;
  }

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-5) var(--sp-4);
  }

  .footer-inner {
    padding: 32px 20px 24px;
  }
}

@media (max-width: 600px) {
  body,
  .site-body {
    font-size: 15px;
  }

  .header-inner {
    padding: 10px 16px;
  }

  .brand {
    font-size: 18px;
  }

  .site-main {
    padding: 0 16px 48px;
  }

  .fact-bar-text,
  .fact-bar-hint {
    padding-left: 16px;
    padding-right: 16px;
  }

  .home-main {
    padding-top: var(--sp-5);
  }

  .hero {
    padding-bottom: var(--sp-6);
  }

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

  .hero-lead {
    font-size: 16px;
  }

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

  .btn {
    width: 100%;
  }

  .directions,
  .process-preview,
  .delivery-preview,
  .faq-preview,
  .column-index,
  .check-order-section,
  .direction-diff-section,
  .feedback-section,
  .transition-section,
  .acceptance-standards,
  .out-of-scope,
  .faq-group,
  .checklist-section {
    padding: var(--sp-6) 0;
  }

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

  .page-header {
    padding: 18px 0 22px;
    margin-bottom: var(--sp-6);
  }

  .page-title {
    font-size: 24px;
  }

  .page-lead,
  .page-intro {
    font-size: 15px;
  }

  .direction-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: var(--sp-3);
  }

  .stage-grid,
  .delivery-columns,
  .check-order-list,
  .diff-list,
  .feedback-list,
  .scope-list,
  .faq-category-list,
  .next-step-grid,
  .related-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .column-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-3);
  }

  .column-link {
    padding: 14px 12px;
  }

  .direction-item.direction-item,
  .stage-item.stage-item,
  .delivery-item {
    padding: 18px 16px;
  }

  .checklist-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: var(--sp-3);
  }

  .checklist-index {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }

  .faq-question {
    font-size: 15px;
    min-height: 52px;
  }

  .error-panel {
    padding: 28px 20px;
  }

  .error-code {
    font-size: 36px;
  }

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

  .error-action-primary,
  .error-action-link {
    width: 100%;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-5);
  }

  .footer-inner {
    padding: 28px 16px 22px;
  }

  .footer-copy {
    margin-top: 24px;
  }
}

/* 滚动出现动画：仅作为增强，不隐藏初始内容 */
@media (prefers-reduced-motion: no-preference) {
  .directions,
  .process-preview,
  .delivery-preview,
  .faq-preview,
  .column-index,
  .check-order-section,
  .direction-diff-section,
  .feedback-section,
  .transition-section,
  .acceptance-standards,
  .out-of-scope,
  .checklist-section,
  .next-step-section {
    animation: section-rise 0.5s ease-out both;
  }
}

@keyframes section-rise {
  from {
    transform: translateY(10px);
  }
  to {
    transform: translateY(0);
  }
}

/* 锚点跳转目标可见焦点 */
.direction-item:target,
.stage-item:target,
.delivery-item:target,
.acceptance-standards:target,
.checklist-section:target,
.feedback-section:target {
  outline: 2px solid var(--c-primary);
  outline-offset: 4px;
}