/* ============ Reset & 基础 ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, serif;
  font-size: 16px;
  line-height: 1.75;
  color: #1A1A1A;
  background: #F5F7FA;
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 900;
  line-height: 1.25;
  color: #0A1F44;
}

a {
  color: #0A1F44;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

a:hover {
  color: #C9A961;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 3px solid #FF6B2C;
  outline-offset: 2px;
  border-radius: 2px;
}

[hidden] {
  display: none !important;
}

img {
  object-fit: cover;
}

/* ============ CSS 变量 ============ */
:root {
  --color-bg-deep: #0A1F44;
  --color-bg-body: #F5F7FA;
  --color-bg-card: #FFFFFF;
  --color-gold: #C9A961;
  --color-action: #FF6B2C;
  --color-text-dark: #1A1A1A;
  --color-text-muted: #6B728E;
  --color-border-soft: #E0E3EA;
  --color-grad-start: #0F2B5C;
  --color-grad-end: #1E4D8C;
  --color-white: #FFFFFF;
  --color-bg-deep-soft: #0F2B5C;
  --content-max: 1200px;
  --container-pad: 24px;
  --radius-card: 16px;
  --radius-small: 8px;
  --transition-base: 0.2s ease;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, serif;
  --shadow-card: 0 4px 20px rgba(10, 31, 68, 0.06);
  --shadow-card-hover: 0 8px 28px rgba(10, 31, 68, 0.12);
}

/* ============ 通用容器与排版 ============ */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  padding: 72px 0;
}

.section--tight {
  padding: 48px 0;
}

.section--loose {
  padding: 96px 0;
}

.section__header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 16px 32px;
  margin-bottom: 40px;
}

.section__title {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  height: 44px;
  border-left: 2px solid var(--color-gold);
  padding-left: 8px;
  margin-left: auto;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  background: rgba(201, 169, 97, 0.12);
  border: 1px solid rgba(201, 169, 97, 0.45);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 18px;
}

/* ============ 面包屑 ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 12px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

.breadcrumb__sep {
  color: rgba(255, 255, 255, 0.4);
  margin: 0 2px;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-gold);
}

/* ============ 跳过链接 ============ */
.skip-link {
  position: fixed;
  top: -100px;
  left: 24px;
  z-index: 9999;
  background: var(--color-action);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 0 0 var(--radius-small) var(--radius-small);
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 0;
}

/* ============ 头部 ============ */
.site-header {
  position: relative;
  background: var(--color-bg-deep);
  background-image: linear-gradient(135deg, var(--color-grad-start), var(--color-grad-end));
  border-bottom: 1px solid rgba(201, 169, 97, 0.25);
}

.site-header__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 72px;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: #fff;
}

.brand:hover {
  color: var(--color-gold);
}

.brand-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-gold);
  color: var(--color-bg-deep);
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(201, 169, 97, 0.3);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.brand:hover .brand-badge {
  background: #fff;
  color: var(--color-gold);
  transform: rotate(-4deg) scale(1.04);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.6);
}

.brand:hover .brand-sub {
  color: rgba(201, 169, 97, 0.85);
}

/* 命令栏导航 */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: block;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  padding: 8px 14px;
  border-radius: 6px;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.site-nav__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(201, 169, 97, 0.3);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold);
  border-color: rgba(201, 169, 97, 0.5);
  background: rgba(201, 169, 97, 0.1);
}

/* 头部右侧动作区 */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.search-trigger::before {
  content: "";
  width: 12px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 50%;
  position: relative;
}

.search-trigger::after {
  content: "";
  width: 6px;
  height: 2px;
  background: currentColor;
  position: relative;
  transform: rotate(45deg);
  left: -5px;
  top: 8px;
}

.search-trigger:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.search-trigger[aria-expanded="true"] {
  color: var(--color-gold);
  background: rgba(201, 169, 97, 0.12);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.04);
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease, background-color 0.2s ease;
}

.nav-toggle:hover .nav-toggle__bar {
  background: var(--color-gold);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 搜索面板 */
.search-panel {
  display: none;
  background: var(--color-bg-deep);
  border-top: 1px solid rgba(201, 169, 97, 0.2);
  box-shadow: 0 20px 40px rgba(10, 31, 68, 0.35);
}

.search-panel[data-open] {
  display: block;
}

.search-panel__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 32px var(--container-pad) 28px;
}

.search-panel__label {
  display: block;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: 12px;
}

.search-panel__row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.search-input {
  flex: 1;
  font-family: var(--font-sans);
  font-size: 16px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  padding: 14px 18px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.search-input::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.search-input:focus-visible {
  border-color: var(--color-gold);
  background: rgba(255, 255, 255, 0.12);
  outline: none;
  box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.2);
}

.search-panel__hint {
  font-family: var(--font-sans);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  flex-shrink: 0;
}

.search-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.search-tags__label {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
}

.tag-btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 6px 14px;
  transition: all 0.2s ease;
}

.tag-btn:hover {
  color: var(--color-bg-deep);
  background: var(--color-gold);
  border-color: var(--color-gold);
}

/* 移动导航打开状态 */
@media (max-width: 920px) {
  .site-header__inner {
    flex-wrap: wrap;
    height: auto;
    min-height: 72px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-header__actions {
    margin-left: auto;
  }

  .search-trigger {
    order: -1;
  }

  .site-nav {
    width: 100%;
    margin-left: 0;
    display: none;
    border-top: 1px solid rgba(201, 169, 97, 0.25);
    margin-top: 12px;
    padding-top: 8px;
  }

  .site-nav[data-open] {
    display: block;
    padding-bottom: 8px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    padding: 12px 14px;
    border-radius: 8px;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(201, 169, 97, 0.14);
  }
}

/* 平板断点 */
@media (max-width: 640px) {
  .site-header__inner {
    gap: 16px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand-sub {
    display: none;
  }

  .search-panel__row {
    flex-direction: column;
    align-items: stretch;
  }

  .search-panel__hint {
    font-size: 12px;
  }

  .search-trigger {
    padding: 8px 10px;
    font-size: 13px;
  }
}

/* ============ 通用按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  padding: 15px 28px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
}

.btn--primary {
  background: var(--color-action);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 107, 44, 0.28);
}

.btn--primary:hover {
  background: #f15a1b;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 107, 44, 0.35);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(255, 107, 44, 0.25);
}

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

.btn--ghost:hover {
  background: rgba(201, 169, 97, 0.1);
  color: var(--color-gold);
  box-shadow: 0 0 0 1px rgba(201, 169, 97, 0.2);
}

.btn--light {
  background: #fff;
  color: var(--color-bg-deep);
  box-shadow: 0 4px 16px rgba(10, 31, 68, 0.1);
}

.btn--light:hover {
  background: var(--color-gold);
  color: #fff;
  transform: translateY(-2px);
}

.btn--sm {
  padding: 10px 18px;
  font-size: 13px;
  border-radius: 8px;
}

.link-underline {
  position: relative;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.25s ease;
}

.link-underline:hover {
  color: var(--color-gold);
}

.link-underline:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* ============ 卡片基础 ============ */
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(201, 169, 97, 0.5);
}

.card--deep {
  background: var(--color-bg-deep);
  border-color: rgba(201, 169, 97, 0.35);
  color: rgba(255, 255, 255, 0.8);
}

.card--deep .card__title {
  color: #fff;
  font-size: 22px;
}

.card__title {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 900;
  color: var(--color-bg-deep);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card__meta {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}

.card__body {
  font-size: 15px;
  color: var(--color-text-dark);
  line-height: 1.8;
}

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

/* 图片占位容器 */
.image-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg, rgba(10, 31, 68, 0.06), rgba(201, 169, 97, 0.14));
  border: 1px solid var(--color-border-soft);
}

.image-frame::before {
  content: "";
  display: block;
  padding-top: 62%;
}

.image-frame--tall::before {
  padding-top: 75%;
}

.image-frame--wide::before {
  padding-top: 45%;
}

.image-frame img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame__icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(201, 169, 97, 0.3);
  border: 2px solid var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 24px;
  font-weight: 900;
  color: rgba(201, 169, 97, 0.8);
}

/* ============ 标签列表 ============ */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list__item {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-bg-deep);
  background: #fff;
  border: 1px solid rgba(201, 169, 97, 0.55);
  border-radius: 999px;
  padding: 6px 16px;
  transition: all 0.2s ease;
}

.tag-list__item:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: #fff;
}

/* ============ 分步引导 ============ */
.step-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-card);
  padding: 36px 28px 30px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.step:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 169, 97, 0.55);
  box-shadow: var(--shadow-card-hover);
}

.step__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(201, 169, 97, 0.12);
  border: 1px solid rgba(201, 169, 97, 0.45);
  color: var(--color-gold);
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 18px;
}

.step__title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 800;
  color: var(--color-bg-deep);
  margin-bottom: 8px;
}

.step__text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============ 页脚 ============ */
.site-footer {
  background: var(--color-bg-deep);
  background-image: linear-gradient(145deg, #071630, #0F2B5C);
  color: rgba(255, 255, 255, 0.72);
  margin-top: 72px;
}

.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px var(--container-pad) 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.site-footer__brand {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}

.site-footer__brand::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--color-gold);
  border-radius: 3px;
  margin-right: 10px;
  vertical-align: 2px;
}

.site-footer__desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 480px;
  margin: 14px 0 22px;
}

.site-footer__heading {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.site-footer__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  margin-bottom: 20px;
}

.site-footer__link {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-footer__link:hover {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

.site-footer__contact {
  font-family: var(--font-sans);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 6px;
  line-height: 1.6;
}

.site-footer__contact .site-footer__link {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__address {
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.4);
  border-left: 2px solid rgba(201, 169, 97, 0.4);
  padding-left: 12px;
  margin-top: 20px;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.16);
}

.site-footer__bottom-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 18px var(--container-pad);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.45);
}

.site-footer__icp {
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 920px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .site-footer__inner {
    padding: 40px 16px 32px;
  }

  .site-footer__list {
    gap: 14px;
  }

  .site-footer__bottom-inner {
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============ 内页首屏 ============ */
.page-hero {
  background: var(--color-bg-deep);
  background-image: linear-gradient(135deg, var(--color-grad-start), var(--color-grad-end));
  color: #fff;
  padding: 88px 0 72px;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px solid rgba(201, 169, 97, 0.2);
  box-shadow: 0 0 0 30px rgba(201, 169, 97, 0.04), 0 0 0 60px rgba(201, 169, 97, 0.02);
  pointer-events: none;
}

.page-hero__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  position: relative;
  z-index: 1;
}

.page-hero__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 720px;
}

.page-hero__lead {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-top: 18px;
}

@media (max-width: 640px) {
  .page-hero {
    padding: 60px 0 48px;
  }
}

/* ============ 工具类 ============ */
.text-center {
  text-align: center;
}

.mt-8 {
  margin-top: 8px;
}

.mt-16 {
  margin-top: 16px;
}

.mt-24 {
  margin-top: 24px;
}

.mt-32 {
  margin-top: 32px;
}

.mt-48 {
  margin-top: 48px;
}

.mb-24 {
  margin-bottom: 24px;
}

.mb-32 {
  margin-bottom: 32px;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

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

@media (max-width: 920px) {
  .content-grid,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .step-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .content-grid,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 48px 0;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .card {
    padding: 24px 20px;
  }
}

/* ============ 滚动进度线 ============ */
.progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-action));
  z-index: 2000;
  pointer-events: none;
  transition: width 0.08s linear;
}

@media (prefers-reduced-motion: reduce) {
  .progress-line {
    display: none;
  }
}

/* ============ reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .step:hover,
  .card:hover {
    transform: none;
  }
}

/* ============ 打印基础 ============ */
@media print {
  .site-header,
  .site-footer,
  .skip-link,
  .progress-line,
  .search-panel {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}