/* =========================================================
   dafa-smooth.com.cn  /assets/site.css
   共享外壳：重置 · 变量 · 中文排版 · 刊头 · 页脚 · 通用组件
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --ink: #0A1A2A;
  --ink-2: #12304A;
  --ink-3: #1B4260;
  --orange: #FF6A2B;
  --gold: #E4B24C;
  --celadon: #4FA08B;
  --brick: #C6482F;
  --cream: #F5EFE4;
  --mist: #8FA6BC;
  --light: #D8DEE5;
  --charcoal: #0F1418;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --wide: 1240px;
  --text: 760px;

  --r-sm: 12px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-xl: 40px;
  --r-pill: 999px;

  --fs-display: clamp(2.75rem, 11vw, 7.5rem);
  --fs-h1: clamp(2.25rem, 6.5vw, 4.5rem);
  --fs-h2: clamp(1.75rem, 4.2vw, 3rem);
  --fs-h3: clamp(1.35rem, 2.6vw, 2rem);
  --fs-h4: 1.25rem;
  --fs-body: 1.0625rem;
  --fs-small: 0.9375rem;
  --fs-label: 0.75rem;

  --ease: cubic-bezier(.2, .7, .2, 1);
  --line: rgba(143, 166, 188, .22);
  --line-strong: rgba(216, 222, 229, .38);
  --line-dark: rgba(15, 20, 24, .14);
  --shadow-card: 0 18px 42px rgba(4, 12, 20, .38);
  --shadow-pill: 0 10px 24px rgba(255, 106, 43, .28);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--light);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .6em;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: .04em;
  color: var(--cream);
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p { margin: 0 0 1.2em; }
ul, ol { margin: 0 0 1.2em; padding-left: 1.25em; }
li { margin-bottom: .35em; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
table { width: 100%; border-collapse: collapse; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 3. 中文排版与数字 ---------- */
.num, .stat-value, .brand-sub, .tag, .eyebrow, .crumb, .footer-index {
  font-family: var(--mono);
}
.num, .stat-value { font-variant-numeric: tabular-nums; letter-spacing: .02em; }

.display {
  font-size: var(--fs-display);
  line-height: .95;
  letter-spacing: .02em;
  font-weight: 900;
  margin: 0;
  color: var(--cream);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.8;
  color: var(--light);
  margin-bottom: 1.5em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 .9rem;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .75;
}

.prose { max-width: var(--text); }
.prose h2 { margin-top: 2.1em; }
.prose h3 { margin-top: 1.7em; }
.prose ul, .prose ol { padding-left: 1.35em; }
.prose blockquote {
  margin: 1.6em 0;
  padding: .35em 0 .35em 1.2em;
  border-left: 3px solid var(--gold);
  color: var(--cream);
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  top: -120px;
  left: 1rem;
  z-index: 200;
  padding: .7rem 1.15rem;
  background: var(--gold);
  color: var(--charcoal);
  font-weight: 700;
  letter-spacing: .06em;
  border-radius: 0 0 .75rem .75rem;
  transition: top .25s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 5. 刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(10, 26, 42, .94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.masthead-inner {
  width: 100%;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.45rem clamp(1rem, 4vw, 2.5rem) 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .9rem;
  transition: padding .3s var(--ease), gap .3s var(--ease);
}

.masthead-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: .75rem;
  width: 100%;
}

/* 品牌报头 */
.brand {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  line-height: 1.05;
}
.brand-name {
  font-size: clamp(1.35rem, 3.4vw, 2.25rem);
  font-weight: 900;
  letter-spacing: .1em;
  color: var(--cream);
}
.brand-sub {
  max-height: 2rem;
  margin-top: .4rem;
  font-size: .68rem;
  letter-spacing: .26em;
  color: var(--mist);
  overflow: hidden;
  transition: max-height .3s var(--ease), opacity .2s var(--ease), margin-top .3s var(--ease);
}

/* 移动端菜单按钮 */
.nav-toggle {
  grid-column: 1;
  justify-self: start;
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .5rem .9rem;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  color: var(--light);
  font-size: .82rem;
  letter-spacing: .12em;
  transition: border-color .24s var(--ease), color .24s var(--ease), background .24s var(--ease);
}
.nav-toggle:hover { border-color: var(--orange); color: var(--cream); }
.nav-toggle-bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle-bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform-origin: 50% 50%;
  transition: transform .26s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 胶囊入口 */
.cta-pill {
  grid-column: 3;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .6rem 1.15rem;
  background: var(--orange);
  color: var(--ink);
  font-weight: 700;
  font-size: .92rem;
  letter-spacing: .06em;
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-pill);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), background .24s var(--ease);
}
.cta-pill:hover {
  transform: translateY(-2px);
  background: #ff7d45;
  box-shadow: 0 14px 30px rgba(255, 106, 43, .42);
}

/* 居中栏目 */
.site-nav {
  display: flex;
  justify-content: center;
  width: 100%;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list li { margin: 0; }
.nav-list a {
  display: block;
  padding: .5rem .95rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: .95rem;
  letter-spacing: .08em;
  color: var(--light);
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.nav-list a:hover { background: rgba(255, 106, 43, .14); color: var(--cream); }
.nav-list a[aria-current="page"] {
  background: rgba(228, 178, 76, .16);
  border-color: rgba(228, 178, 76, .48);
  color: var(--gold);
}

/* 阅读进度 */
.progress-track {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: rgba(143, 166, 188, .16);
  overflow: hidden;
}
.progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange), var(--gold) 62%, var(--celadon));
  transition: transform .12s linear;
}

/* 滚动后收窄 */
.site-header[data-stuck] .masthead-inner { padding-top: .7rem; padding-bottom: .6rem; gap: .5rem; }
.site-header[data-stuck] .brand-sub { max-height: 0; margin-top: 0; opacity: 0; }
.site-header[data-stuck] .brand-name { font-size: clamp(1.05rem, 2.4vw, 1.4rem); }
.site-header[data-stuck] .nav-list a { padding: .34rem .85rem; font-size: .86rem; }
.site-header[data-stuck] .cta-pill { padding: .45rem .9rem; font-size: .82rem; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(340px, 46%);
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--gold));
}

.footer-inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1rem, 4vw, 2.5rem) clamp(1.5rem, 3vw, 2.25rem);
  display: grid;
  grid-template-columns: 1.15fr 1.15fr 1fr 1fr;
  gap: clamp(1.5rem, 3.4vw, 2.75rem);
}

.footer-title {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  margin: 0 0 1rem;
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-index {
  font-size: .68rem;
  color: var(--mist);
  opacity: .8;
}

.footer-list,
.footer-meta {
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-list li, .footer-meta li { margin: 0 0 .1rem; }
.footer-list a {
  display: inline-block;
  padding: .24rem 0;
  font-size: .95rem;
  color: var(--light);
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.footer-list a:hover { color: var(--orange); border-bottom-color: var(--orange); }
.footer-list a[aria-current="page"] { color: var(--gold); }

.footer-meta li {
  padding: .22rem 0;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--mist);
}
.footer-meta a {
  display: inline-block;
  padding: .24rem 0;
  color: var(--light);
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.footer-meta a:hover { color: var(--orange); border-bottom-color: var(--orange); }

.footer-base {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.15rem clamp(1rem, 4vw, 2.5rem) 2.25rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
}
.footer-logo {
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: .1em;
  color: var(--cream);
}
.footer-logo:hover { color: var(--gold); }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-legal li { margin: 0; }
.footer-legal a {
  font-size: .85rem;
  color: var(--light);
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.footer-legal a:hover { color: var(--orange); border-bottom-color: var(--orange); }
.footer-copy {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 7. 布局骨架 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
}
.wrap--narrow { max-width: 860px; }

.section {
  position: relative;
  padding: clamp(3rem, 7vw, 6rem) 0;
}
.section--cream {
  background: var(--cream);
  color: var(--charcoal);
}
.section--cream h1,
.section--cream h2,
.section--cream h3,
.section--cream h4,
.section--cream h5,
.section--cream h6 { color: var(--charcoal); }
.section--cream .display { color: var(--charcoal); }
.section--cream .lede { color: #3b444e; }
.section--cream .eyebrow { color: #8a5a12; }
.section--cream .tag { color: #6b6f75; border-color: var(--line-dark); }
.section--cream .index-list,
.section--cream .index-item { border-color: var(--line-dark); }
.section--cream .index-item:hover { background: rgba(198, 72, 47, .07); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
.split--alt { grid-template-columns: 7fr 5fr; }

/* ---------- 8. 组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 1.6rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .06em;
  transition: transform .24s var(--ease), background .24s var(--ease),
              border-color .24s var(--ease), color .24s var(--ease), box-shadow .24s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: var(--orange);
  color: var(--ink);
  box-shadow: var(--shadow-pill);
}
.btn--primary:hover { background: #ff7d45; }
.btn--gold { background: var(--gold); color: var(--charcoal); }
.btn--gold:hover { background: #efc264; }
.btn--ghost {
  border-color: var(--line-strong);
  color: var(--cream);
}
.btn--ghost:hover {
  background: rgba(255, 106, 43, .12);
  border-color: var(--orange);
  color: var(--cream);
}
.section--cream .btn--ghost {
  border-color: rgba(15, 20, 24, .32);
  color: var(--charcoal);
}
.section--cream .btn--ghost:hover {
  background: rgba(198, 72, 47, .1);
  border-color: var(--brick);
  color: var(--charcoal);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .28rem .72rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--mist);
  line-height: 1.5;
}
.tag--gold { border-color: rgba(228, 178, 76, .5); color: var(--gold); }
.tag--orange { border-color: rgba(255, 106, 43, .5); color: var(--orange); }
.tag--ok { border-color: rgba(79, 160, 139, .55); color: var(--celadon); }
.tag--warn { border-color: rgba(198, 72, 47, .55); color: var(--brick); }

.card {
  display: block;
  padding: clamp(1.25rem, 2.5vw, 1.85rem);
  background: linear-gradient(160deg, rgba(18, 48, 74, .92), rgba(10, 26, 42, .92));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  transition: transform .28s var(--ease), border-color .28s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: rgba(228, 178, 76, .42); }
.card h3, .card h4 { margin-bottom: .45em; }
.card p:last-child { margin-bottom: 0; }
.section--cream .card {
  background: #fffdf8;
  border-color: var(--line-dark);
  box-shadow: 0 14px 32px rgba(15, 20, 24, .12);
}
.section--cream .card:hover { border-color: rgba(198, 72, 47, .4); }

.stat {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: 1.1rem 1.25rem;
  background: rgba(18, 48, 74, .66);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.stat-value {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1;
  color: var(--gold);
}
.stat-label {
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--mist);
}

.index-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.index-list li { margin: 0; }
.index-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: .85rem .3rem;
  border-bottom: 1px solid var(--line);
  transition: background .24s var(--ease), padding-left .24s var(--ease);
}
.index-item:hover { background: rgba(255, 106, 43, .08); padding-left: .7rem; }

.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--mist);
}
.crumb li { margin: 0; }
.crumb a { color: var(--mist); transition: color .22s var(--ease); }
.crumb a:hover { color: var(--orange); }
.crumb [aria-current="page"] { color: var(--gold); }
.crumb li + li::before {
  content: "/";
  margin-right: .5rem;
  color: rgba(143, 166, 188, .55);
}

/* 图片容器基础规则（共享外壳不放图，供页面阶段使用） */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--ink-2), var(--ink-3));
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .24em;
  color: rgba(228, 178, 76, .55);
  text-transform: uppercase;
}

/* ---------- 9. 动效协议 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .split,
  .split--alt { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .masthead-inner { gap: .6rem; padding-top: 1.05rem; }
  .nav-toggle { display: inline-flex; }

  .brand-name { font-size: clamp(1.1rem, 4.8vw, 1.5rem); letter-spacing: .07em; }
  .brand-sub { font-size: .6rem; letter-spacing: .18em; margin-top: .3rem; }

  .site-nav { display: none; }
  .site-nav[data-open] { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: .12rem;
    width: 100%;
    padding-top: .6rem;
    border-top: 1px solid var(--line);
  }
  .nav-list a {
    padding: .72rem .6rem;
    border-radius: var(--r-sm);
    font-size: 1rem;
    letter-spacing: .06em;
  }
  .nav-list a[aria-current="page"] { border-color: transparent; }

  .site-header[data-stuck] .nav-list a { padding: .72rem .6rem; font-size: 1rem; }
  .site-header[data-stuck] .brand-sub { max-height: 2rem; opacity: 1; margin-top: .3rem; }
}

@media (max-width: 720px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; }
  .index-item { grid-template-columns: auto 1fr; }
  .index-item > :last-child { grid-column: 2; justify-self: start; }
}

@media (max-width: 560px) {
  .footer-inner { grid-template-columns: 1fr; gap: 1.75rem; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .nav-toggle-text { display: none; }
  .cta-pill { padding: .45rem .7rem; font-size: .75rem; letter-spacing: .02em; }
}

/* ---------- 11. 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html { scroll-behavior: auto; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .btn:hover, .cta-pill:hover, .index-item:hover { transform: none; }
}