/* ═══════════════════════════════════════════════════════════
   JORAN 觉然 — joran.online 官网样式
   Tokens 来源: JORAN 觉然 Design System (studio/index.html 为权威源)
   "一枚印在纸上的图章，和它周围安静的空气。"
   ═══════════════════════════════════════════════════════════ */

:root {
  color-scheme: light;

  /* ── Light 象牙白反色 ── */
  --bg:         #E7E1D5;
  --surface:    #F7F4ED;
  --ink:        #10182C;
  --ink-soft:   rgba(16, 24, 44, 0.64);
  --line:       rgba(16, 24, 44, 0.12);
  --accent:     #3E5480;
  --accent-ink: #F7F4ED;
  --hover:      rgba(62, 84, 128, 0.08);
  --stage:      #DBD4C4;
  --shadow:     0 24px 64px -20px rgba(16, 24, 44, 0.22);

  /* ── Dark 深海靛黑（footer / 反色带） ── */
  --dark-bg:         #0B1126;
  --dark-surface:    #10182C;
  --dark-ink:        #E8E4DC;
  --dark-ink-soft:   rgba(232, 228, 220, 0.60);
  --dark-line:       rgba(126, 155, 214, 0.16);
  --dark-accent:     #7E9BD6;
  --dark-accent-ink: #0B1126;
  --dark-shadow:     0 24px 64px -16px rgba(0, 0, 0, 0.60);

  /* ── 动效色 ── */
  --ochre:  #7A3B26;   /* 赭石 — 边角小注释专用 */
  --dust:   #7C8BA8;

  /* ── 字体 ── */
  --font-serif: "Newsreader", "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans:  "Manrope", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mono:  ui-monospace, "SF Mono", "Menlo", monospace;

  /* ── 动效 ── */
  --ease-brand: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration-fade: 700ms;

  /* ── 圆角 ── */
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

::selection { background: rgba(62, 84, 128, 0.18); }

/* ═══ 布局容器 ═══ */
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 28px; }
.prose { max-width: 720px; }

/* ═══ 导航 ═══ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(231, 225, 213, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1040px; margin: 0 auto; padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand svg { display: block; }
.nav-brand-zh {
  font-family: var(--font-serif); font-weight: 400; font-size: 17px;
  letter-spacing: 0.32em; line-height: 1;
}
.nav-brand-en {
  font-family: var(--font-sans); font-weight: 500; font-size: 9.5px;
  letter-spacing: 0.32em; color: var(--ink-soft); line-height: 1; margin-top: 4px;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a {
  font-family: var(--font-serif); font-size: 14.5px; color: var(--ink-soft);
  transition: color 0.18s var(--ease-brand);
}
.nav-links a:hover { color: var(--accent); }
.nav-cta {
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 600;
  letter-spacing: 0.08em;
  background: var(--accent); color: var(--accent-ink) !important;
  padding: 8px 16px; border-radius: var(--radius-md);
  transition: filter 0.18s var(--ease-brand), transform 0.18s;
}
.nav-cta:hover { filter: brightness(1.08); }
.nav-cta:active { transform: translateY(1px); }

/* ═══ 版式原语 ═══ */

/* 眉题 — panel label */
.panel-label {
  font-family: var(--font-sans); font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-soft);
}

/* 边角小注释 — 赭石专用 */
.corner-note {
  font-family: var(--font-sans); font-size: 10.5px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--ochre);
}

/* 章节头 */
.section { padding: 96px 0; position: relative; }
.section-head { margin-bottom: 48px; }
.section-head .panel-label { display: block; margin-bottom: 14px; }
.section-title {
  font-family: var(--font-serif); font-weight: 400; font-size: 34px;
  letter-spacing: 0.06em; line-height: 1.3;
}
.section-intro { color: var(--ink-soft); max-width: 640px; margin-top: 16px; font-size: 16.5px; }

hr.rule {
  border: 0; border-top: 1px solid var(--line);
  width: 120px; margin: 0;
}

/* ═══ 按钮 ═══ */
.btn {
  display: inline-block; font-family: var(--font-sans);
  font-size: 13.5px; font-weight: 600; letter-spacing: 0.06em;
  padding: 11px 22px; border-radius: var(--radius-md);
  border: 1px solid transparent; cursor: pointer;
  transition: all 0.18s var(--ease-brand);
  line-height: 1.5;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ═══ 卡片 ═══ */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.25s var(--ease-brand);
  position: relative;
  overflow: hidden;
}
.card:hover { border-color: rgba(62, 84, 128, 0.4); }
.card-num {
  font-family: var(--font-serif); font-size: 15px; color: var(--accent);
  letter-spacing: 0.1em; margin-bottom: 4px;
}
.card h3 {
  font-family: var(--font-serif); font-weight: 500; font-size: 21px;
  letter-spacing: 0.04em; margin: 10px 0 12px;
}
.card p { color: var(--ink-soft); font-size: 15px; }
.card .corner-note { display: block; margin-top: 18px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

/* ═══ 词签（能力覆盖等） ═══ */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-family: var(--font-serif); font-size: 14px; letter-spacing: 0.06em;
  border: 1px solid var(--line); background: var(--surface);
  padding: 7px 16px; border-radius: 999px; color: var(--ink);
}

/* ═══ 流程时间线 ═══ */
.steps { display: flex; flex-direction: column; }
.step {
  display: grid; grid-template-columns: 88px 1fr auto; gap: 24px;
  align-items: baseline;
  padding: 26px 4px;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step-num {
  font-family: var(--font-serif); font-weight: 300; font-size: 34px;
  color: var(--accent); line-height: 1;
}
.step h3 { font-family: var(--font-serif); font-weight: 500; font-size: 19px; letter-spacing: 0.05em; }
.step p { color: var(--ink-soft); font-size: 15px; margin-top: 6px; max-width: 560px; }
.step .corner-note { white-space: nowrap; }

/* ═══ 金句 / 引言 ═══ */
.quote-block {
  border-left: 2px solid var(--accent);
  padding-left: 24px;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 2;
}

/* ═══ 深色反色带 ═══ */
.band-dark {
  background:
    radial-gradient(ellipse 90% 70% at 68% -16%, rgba(240, 214, 156, 0.22), transparent 60%),
    radial-gradient(ellipse 45% 40% at 4% 12%, rgba(126, 155, 214, 0.08), transparent 70%),
    linear-gradient(180deg, #1F2A45 0%, #10182C 52%, #11111D 100%);
  color: var(--dark-ink);
}
.band-dark .panel-label { color: var(--dark-ink-soft); }
.band-dark .section-title { color: var(--dark-ink); }
.band-dark p { color: var(--dark-ink-soft); }
.band-dark .btn-primary { background: var(--dark-accent); color: var(--dark-accent-ink); }
.band-dark .btn-ghost { background: transparent; color: var(--dark-ink); border-color: var(--dark-line); }
.band-dark .btn-ghost:hover { color: var(--dark-accent); border-color: var(--dark-accent); }

/* ═══ 页脚 ═══ */
.footer {
  background:
    radial-gradient(ellipse 90% 70% at 68% -16%, rgba(240, 214, 156, 0.10), transparent 60%),
    linear-gradient(180deg, #0B1126 0%, #070A18 100%);
  color: var(--dark-ink);
  padding: 72px 0 40px;
  position: relative;
  overflow: hidden;
}
.footer-inner { position: relative; z-index: 1; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.footer-brand-zh { font-family: var(--font-serif); font-weight: 300; font-size: 22px; letter-spacing: 0.45em; }
.footer-brand-en { font-family: var(--font-sans); font-size: 10px; font-weight: 500; letter-spacing: 0.32em; color: var(--dark-ink-soft); margin-top: 6px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; margin-bottom: 36px; }
.footer-links a {
  font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.1em;
  color: var(--dark-ink-soft); transition: color 0.18s;
}
.footer-links a:hover { color: var(--dark-accent); }
.footer-fine {
  font-family: var(--font-sans); font-size: 11px; letter-spacing: 0.08em;
  color: rgba(232, 228, 220, 0.38);
  border-top: 1px solid var(--dark-line); padding-top: 24px;
}
.footer-biglogo {
  position: absolute; right: -60px; bottom: -120px;
  width: 420px; height: 420px; opacity: 0.10; pointer-events: none;
}

/* ═══ Hero ═══ */
.hero {
  min-height: 92vh;
  display: flex; flex-direction: column; justify-content: center;
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
}
.hero .wrap { width: 100%; }
.hero-logo { margin-bottom: 36px; }
.hero-logo svg {
  animation: joran-breathe 7s var(--ease-brand) infinite;
  transform-origin: 50% 40%;
}
.hero-zh {
  font-family: var(--font-serif); font-weight: 300; font-size: 64px;
  letter-spacing: 0.45em; line-height: 1.2; color: var(--ink);
}
.hero-en {
  font-family: var(--font-sans); font-weight: 400; font-size: 12px;
  letter-spacing: 0.32em; color: var(--ink-soft); margin-top: 14px;
}
.hero-headline {
  font-family: var(--font-serif); font-weight: 400; font-size: 40px;
  letter-spacing: 0.08em; line-height: 1.5; margin-top: 56px;
}
.hero-sub { color: var(--ink-soft); font-size: 17px; margin-top: 20px; max-width: 560px; }
.hero-tracks { margin-top: 26px; }
.hero-actions { display: flex; gap: 14px; margin-top: 40px; flex-wrap: wrap; }
.hero-contour {
  position: absolute; left: 0; right: 0; bottom: 0;
  width: 100%; height: 160px; pointer-events: none;
}

/* ═══ 页面头（内页） ═══ */
.page-head { padding: 170px 0 64px; position: relative; overflow: hidden; }
.page-head .panel-label { display: block; margin-bottom: 18px; }
.page-title {
  font-family: var(--font-serif); font-weight: 300; font-size: 46px;
  letter-spacing: 0.14em; line-height: 1.35;
}
.page-title strong { font-weight: 500; }
.page-lede { color: var(--ink-soft); font-size: 17px; margin-top: 20px; max-width: 620px; }

/* ═══ 表单 ═══ */
.field-label {
  font-family: var(--font-sans); font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-soft);
  display: block; margin-bottom: 10px;
}
.field-input {
  width: 100%; font-family: var(--font-serif); font-size: 15.5px;
  color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 14px; outline: none; letter-spacing: 0.02em;
  transition: border-color 0.18s var(--ease-brand);
}
.field-input:focus { border-color: var(--accent); }
textarea.field-input { min-height: 150px; resize: vertical; line-height: 1.8; }

.upload-area {
  border: 1.5px dashed var(--line); border-radius: var(--radius-md);
  padding: 28px; text-align: center; cursor: pointer;
  color: var(--ink-soft); font-size: 14px;
  transition: border-color 0.18s var(--ease-brand), background 0.18s;
}
.upload-area:hover, .upload-area.dragover { border-color: var(--accent); background: var(--hover); }
.upload-hint { font-family: var(--font-sans); font-size: 11px; letter-spacing: 0.06em; margin-top: 6px; color: var(--ink-soft); }

/* ═══ 长文排版 .joran-doc ═══ */
.joran-doc { font-size: 17px; line-height: 1.9; letter-spacing: 0.02em; }
.joran-doc h1 { font-size: 1.9em; font-weight: 400; letter-spacing: 0.06em; line-height: 1.4; margin: 1.6em 0 0.8em; }
.joran-doc h2 {
  font-size: 1.42em; font-weight: 500; letter-spacing: 0.04em; line-height: 1.5;
  padding-left: 14px; border-left: 3px solid var(--accent);
  margin: 2.2em 0 0.9em;
}
.joran-doc h3 { font-size: 1.15em; font-weight: 600; margin: 1.8em 0 0.7em; letter-spacing: 0.03em; }
.joran-doc p { margin: 0 0 1.1em; }
.joran-doc strong { font-weight: 600; }
.joran-doc blockquote {
  border-left: 2px solid var(--accent); padding: 0.2em 0 0.2em 20px;
  color: var(--ink-soft); margin: 1.4em 0;
}
.joran-doc code {
  font-family: var(--font-mono); font-size: 0.86em;
  background: rgba(16, 24, 44, 0.06); padding: 2px 6px; border-radius: 4px;
}
.joran-doc table {
  border-collapse: separate; border-spacing: 0; width: 100%;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; margin: 1.4em 0; font-size: 0.92em;
}
.joran-doc th {
  color: var(--accent); font-weight: 600; text-align: left;
  background: rgba(16, 24, 44, 0.04);
  padding: 10px 14px; border-bottom: 1px solid var(--line);
}
.joran-doc td { padding: 10px 14px; border-bottom: 1px solid var(--line); }
.joran-doc tr:last-child td { border-bottom: none; }
.joran-doc hr { border: 0; border-top: 1px solid var(--line); width: 120px; margin: 2.4em auto; }

/* ═══ 动效 ═══ */
@keyframes joran-breathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.02); }
}
@keyframes joran-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal { opacity: 0; transform: translateY(8px); transition: opacity var(--duration-fade) var(--ease-brand), transform var(--duration-fade) var(--ease-brand); }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-logo svg { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ═══ 纸面颗粒 ═══ */
.grain::after {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='128' height='128'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='22'/%3E%3C/filter%3E%3Crect width='128' height='128' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.045;
  mix-blend-mode: multiply;
}

/* ═══ 响应式 ═══ */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .hero-zh { font-size: 44px; }
  .hero-headline { font-size: 28px; }
  .page-title { font-size: 32px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 27px; }
  .step { grid-template-columns: 56px 1fr; }
  .step .corner-note { grid-column: 2; }
  .nav-links { gap: 16px; }
  .nav-links a:not(.nav-cta) { font-size: 13px; }
  .nav-brand-en { display: none; }
}
@media (max-width: 560px) {
  .nav-links a.nav-hide-sm { display: none; }
  .wrap { padding: 0 20px; }
  .hero-zh { font-size: 36px; letter-spacing: 0.32em; }
}