/*
 * 阶段二：女神异闻录式构图 + 中国风山水色彩。
 *
 * 这里只处理第一屏和全局导航的视觉语言：几何切面、冷墨底、雾青内容面、
 * 数字青绿和高亮朱红作为状态色。二级内容仍然保留骨架层，方便逐段验收。
 */
:root {
  color-scheme: light;
  --paper: #edf2ef;
  --paper-deep: #dce6e2;
  --paper-light: #f8faf7;
  --ink: #10232b;
  --ink-deep: #07151b;
  --jade: #51a596;
  --jade-deep: #2e746f;
  --mineral: #4f789b;
  --signal: #c6ed6c;
  --cinnabar: #ee4d45;
  --cinnabar-dark: #bf3735;
  --bg: var(--paper);
  --surface: var(--paper-light);
  --surface-2: var(--paper-deep);
  --surface-3: #d1dbd7;
  --surface-4: #bdcac4;
  --line: rgba(16, 35, 43, 0.18);
  --line-strong: rgba(16, 35, 43, 0.42);
  --text: var(--ink);
  --text-muted: #53666a;
  --text-dim: #76837e;
  --accent: var(--cinnabar);
  --accent-strong: var(--cinnabar-dark);
  --accent-soft: rgba(238, 77, 69, 0.1);
  --accent-line: rgba(238, 77, 69, 0.52);
  --maxw: 1520px;
  --header-h: 72px;
}

html,
body {
  background: var(--paper);
}

body {
  color: var(--ink);
}

.site-rail {
  border-right: 1px solid rgba(237, 242, 239, 0.15);
  background: var(--ink-deep);
  color: var(--paper);
}

.site-rail__panel {
  isolation: isolate;
}

.site-rail__panel::before {
  position: absolute;
  inset: 0 0 0 auto;
  width: 1px;
  background: var(--cinnabar);
  content: "";
  opacity: 0.8;
}

.site-rail__brand {
  position: relative;
  color: var(--paper);
}

.site-rail__brand-mark {
  position: relative;
  border: 0;
  background: var(--cinnabar);
  color: var(--paper-light);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 76% 100%, 0 100%);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 800;
}

.site-rail__brand-name {
  color: var(--paper-light);
  letter-spacing: 0.08em;
}

.site-rail__nav {
  position: relative;
}

.site-rail__link {
  color: rgba(237, 242, 239, 0.58);
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.site-rail__link::after {
  position: absolute;
  right: 14px;
  bottom: 8px;
  width: 18px;
  height: 1px;
  background: var(--cinnabar);
  content: "";
  opacity: 0;
  transform: translateX(-5px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.site-rail__link:hover,
.site-rail__link.is-active {
  background: rgba(81, 165, 150, 0.14);
  border-left-color: var(--cinnabar);
  color: var(--paper-light);
  transform: translateX(3px);
}

.site-rail__link:hover::after,
.site-rail__link.is-active::after {
  opacity: 1;
  transform: none;
}

.site-rail__index {
  color: var(--jade);
}

.site-rail__link.is-active .site-rail__index {
  color: var(--paper-light);
}

.site-rail__foot {
  color: rgba(237, 242, 239, 0.44);
}

.site-header {
  background: var(--paper-light);
  border-bottom-color: var(--line);
}

.site-main {
  background: var(--paper);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: min(100svh, 960px);
  overflow: hidden;
  background: var(--paper);
  border-bottom: 1px solid var(--line-strong);
}

.hero::before {
  position: absolute;
  z-index: -2;
  top: 0;
  right: -4vw;
  width: 56%;
  height: 100%;
  background: var(--paper-deep);
  clip-path: polygon(16% 0, 100% 0, 100% 82%, 72% 100%, 0 100%);
  content: "";
}

.hero::after {
  position: absolute;
  z-index: -1;
  top: 11%;
  right: 42%;
  width: 34vw;
  height: 1px;
  background: var(--cinnabar);
  content: "";
  opacity: 0.72;
  transform: rotate(-31deg);
  transform-origin: right center;
}

.hero__inner {
  min-height: min(100svh, 960px);
  max-width: var(--maxw);
  padding-top: clamp(86px, 12vh, 144px);
  padding-bottom: clamp(86px, 12vh, 144px);
}

.hero__copy {
  position: relative;
  z-index: 1;
}

.hero__copy::before {
  display: block;
  width: 56px;
  height: 6px;
  margin-bottom: 28px;
  background: var(--cinnabar);
  content: "";
  clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%);
}

.hero__title {
  max-width: 13ch;
  color: var(--ink-deep);
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero__lead {
  max-width: 43ch;
  color: var(--text-muted);
  line-height: 1.95;
}

.hero__actions {
  gap: 14px;
}

.btn {
  min-height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease,
    transform 0.18s ease;
}

.btn:hover {
  border-color: var(--cinnabar);
  background: rgba(238, 77, 69, 0.08);
  color: var(--cinnabar-dark);
  transform: translateY(-2px);
}

.btn--primary,
.btn--primary:hover {
  border-color: var(--cinnabar);
  background: var(--cinnabar);
  color: var(--paper-light);
  clip-path: polygon(0 0, 92% 0, 100% 24%, 100% 100%, 0 100%);
}

.btn--primary:hover {
  background: var(--cinnabar-dark);
  border-color: var(--cinnabar-dark);
}

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

.hero__visual-slot {
  position: relative;
  min-height: clamp(480px, 66vh, 700px);
  border: 0;
  background:
    linear-gradient(151deg, transparent 0 43%, var(--mineral) 43.2% 46%, transparent 46.2%),
    linear-gradient(164deg, transparent 0 55%, var(--jade) 55.2% 63%, transparent 63.2%),
    linear-gradient(180deg, transparent 0 76%, rgba(198, 237, 108, 0.42) 76.2% 77%, transparent 77.2%),
    var(--ink);
  box-shadow: 16px 18px 0 rgba(16, 35, 43, 0.12);
  clip-path: polygon(7% 0, 100% 0, 93% 100%, 0 100%);
}

.hero__visual-slot::before {
  position: absolute;
  inset: 8% 8% 7% 9%;
  border: 1px solid rgba(237, 242, 239, 0.48);
  content: "";
}

.hero__visual-slot::after {
  position: absolute;
  top: 10%;
  right: 7%;
  width: clamp(74px, 9vw, 126px);
  aspect-ratio: 1;
  background: var(--cinnabar);
  content: "";
  clip-path: polygon(0 0, 100% 0, 100% 84%, 78% 100%, 0 100%);
  box-shadow: 10px 10px 0 rgba(237, 242, 239, 0.12);
}

.hero__scroll {
  color: var(--jade-deep);
  font-family: var(--font-mono);
  letter-spacing: 0.22em;
}

.section {
  position: relative;
  padding: clamp(112px, 13vh, 180px) 0;
  border-bottom: 1px solid var(--line);
}

.section__head {
  align-items: flex-start;
}

.section__title {
  position: relative;
  padding-left: 22px;
  color: var(--ink-deep);
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: 0;
}

.section__title::before {
  position: absolute;
  top: 0.2em;
  bottom: 0.18em;
  left: 0;
  width: 6px;
  background: var(--cinnabar);
  content: "";
  clip-path: polygon(0 0, 100% 0, 72% 100%, 0 100%);
}

.section__subtitle,
.about__lead {
  color: var(--text-muted);
}

.stats {
  border-top-color: var(--line-strong);
  border-bottom-color: var(--line-strong);
}

.stat {
  border-right-color: var(--line);
}

.stat__value {
  color: var(--jade-deep);
  font-family: var(--font-mono);
}

.stat__label,
.home-contact__label,
.group-tags__label {
  color: var(--text-dim);
}

.group-banner__open,
.card,
.group-block,
.contact-form,
.contact-info__item,
.empty-state,
.error-state {
  border-color: var(--line-strong);
  border-radius: 0;
  background: var(--paper-light);
  box-shadow: none;
}

.group-banner__open:hover,
.card:hover {
  border-color: var(--cinnabar);
  box-shadow: 8px 8px 0 rgba(16, 35, 43, 0.08);
}

.group-banner__kind {
  border-color: var(--cinnabar);
  border-radius: 0;
  color: var(--cinnabar-dark);
}

.group-banner__name {
  color: var(--ink-deep);
}

.group-banner__summary,
.group-banner__more {
  color: var(--text-muted);
}

.group-banner__more {
  opacity: 1;
  transform: none;
}

.site-footer {
  background: var(--ink-deep);
  border-top-color: var(--ink-deep);
  color: var(--paper);
}

.site-footer .footer__title,
.site-footer .footer__list,
.site-footer .footer__list a,
.site-footer .footer__bottom {
  color: rgba(237, 242, 239, 0.72);
}

.site-footer .footer__list a:hover {
  color: var(--paper-light);
}

.site-footer .footer__bottom {
  border-top-color: rgba(237, 242, 239, 0.18);
}

@media (max-width: 820px) {
  .site-header {
    background: var(--paper-light);
    border-bottom-color: var(--line-strong);
  }

  .hero {
    min-height: 0;
  }

  .hero::before {
    top: 32%;
    width: 112%;
    height: 68%;
  }

  .hero::after {
    top: 30%;
    right: 6%;
    width: 54vw;
  }

  .hero__inner {
    min-height: 0;
    padding-top: 76px;
    padding-bottom: 90px;
  }

  .hero__copy::before {
    margin-bottom: 22px;
  }

  .hero__visual-slot {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    min-height: clamp(330px, 80vw, 470px);
    height: clamp(330px, 80vw, 470px);
    aspect-ratio: auto;
    box-shadow: 10px 12px 0 rgba(16, 35, 43, 0.12);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-rail__link,
  .site-rail__link::after,
  .btn {
    transition: none;
  }
}