/* ============================================
   妙纳睿 Miunary · 官方网站
   风格: 雪花蓝天白云 · 清新天空美学
   主色: 天空蓝 + 雪白 + 云灰
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700;900&family=Noto+Sans+SC:wght@300;400;500;600;700&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=JetBrains+Mono:wght@400;500&display=swap');

/* ========== 变量 ========== */
:root {
  /* 天空色彩 */
  --c-bg: #ffffff;
  --c-bg-alt: #f4f8fc;       /* 近白的天空灰 */
  --c-bg-cloud: #eaf2f9;     /* 云朵灰 */
  --c-bg-sky: #cfe2f3;       /* 浅天空蓝 */

  /* 文字 */
  --c-ink: #1a2940;          /* 深夜空蓝 */
  --c-ink-soft: #4a5b78;     /* 山峦蓝灰 */
  --c-ink-muted: #8fa0b8;    /* 云雾灰 */
  --c-ink-invert: #ffffff;

  /* 品牌强调色 - 天空蓝 */
  --c-accent: #3d7cc9;       /* 主天空蓝 */
  --c-accent-deep: #2558a3;  /* 深海天蓝 */
  --c-accent-light: #9bc3ec; /* 淡空蓝 */
  --c-accent-mist: #d8e8f5;  /* 雾气蓝 */

  /* 辅助色 - 晨光金(留学/远方的温度) */
  --c-warm: #d4a574;

  /* 边框 */
  --c-border: #e4edf5;
  --c-border-strong: #c9d9e8;

  /* 字体 */
  --f-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --f-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif;
  --f-display: "Cormorant Garamond", "Noto Serif SC", Georgia, serif;
  --f-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

  /* 间距 */
  --s-1: 8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-6: 48px;
  --s-8: 64px;
  --s-12: 96px;
  --s-16: 128px;

  /* 圆角 */
  --r-sm: 4px;
  --r-md: 14px;
  --r-lg: 24px;
  --r-full: 999px;

  /* 阴影 */
  --shadow-soft: 0 4px 24px rgba(61, 124, 201, 0.08);
  --shadow-float: 0 20px 60px -20px rgba(61, 124, 201, 0.25);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--f-sans);
  font-weight: 400;
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s, opacity 0.25s;
}

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

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--s-4);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 34px;
  font-family: var(--f-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--r-full);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-accent);
  color: white;
  border-color: var(--c-accent);
}

.btn-primary:hover {
  background: var(--c-accent-deep);
  border-color: var(--c-accent-deep);
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -10px rgba(61, 124, 201, 0.5);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: white;
}

.btn-outline {
  background: transparent;
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
}

.btn-outline:hover {
  background: var(--c-accent);
  color: white;
}

.btn-sm {
  padding: 11px 24px;
  font-size: 14px;
}

.btn-lg {
  padding: 18px 42px;
  font-size: 16px;
}

/* ========== 导航 ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 22px 0;
  transition: background 0.3s, padding 0.3s, box-shadow 0.3s;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  padding: 14px 0;
  box-shadow: 0 1px 0 rgba(61, 124, 201, 0.08);
}

.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--s-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
  color: white;
  transition: color 0.3s;
}

.nav.scrolled .brand {
  color: var(--c-ink);
}

.brand-cn {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.08em;
}

.brand-en {
  font-family: var(--f-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.35em;
  margin-top: 5px;
  opacity: 0.75;
}

.nav-menu {
  display: flex;
  gap: var(--s-6);
  align-items: center;
}

.nav-menu a {
  font-size: 16px;
  font-weight: 500;
  color: white;
  position: relative;
  padding: 8px 2px;
  transition: color 0.3s;
  letter-spacing: 0.02em;
}

.nav.scrolled .nav-menu a {
  color: var(--c-ink);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--c-accent);
  transition: width 0.3s, left 0.3s;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
  left: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  transition: all 0.3s;
}

.nav.scrolled .nav-toggle span {
  background: var(--c-ink);
}

/* ========== Hero 蓝天雪山 ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: white;
}

/* 蓝天渐变背景 */
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg,
      #a9d0ec 0%,      /* 天顶蓝 */
      #c4dff0 30%,     /* 中天蓝 */
      #dfecf5 60%,     /* 地平线淡蓝 */
      #f0f6fa 80%,     /* 山尖雾白 */
      #e8f0f7 100%     /* 近景 */
    );
  z-index: 0;
}

/* 云朵 SVG */
.hero-clouds {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.cloud {
  position: absolute;
  opacity: 0.85;
  animation: drift 60s linear infinite;
}

.cloud svg {
  width: 100%;
  height: auto;
  filter: blur(0.5px);
}

.cloud-1 { top: 10%; left: -8%; width: 240px; animation-delay: 0s; animation-duration: 70s; }
.cloud-2 { top: 22%; left: 20%; width: 180px; opacity: 0.65; animation-duration: 80s; }
.cloud-3 { top: 8%; left: 55%; width: 300px; opacity: 0.9; animation-duration: 90s; }
.cloud-4 { top: 30%; left: 80%; width: 200px; opacity: 0.7; animation-duration: 75s; }
.cloud-5 { top: 45%; left: 10%; width: 160px; opacity: 0.5; animation-duration: 100s; }

/* 雪山剪影 */
.hero-mountains {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  pointer-events: none;
  height: 55%;
}

.hero-mountains svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* 飘落雪花 */
.hero-snow {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  overflow: hidden;
}

.snowflake {
  position: absolute;
  top: -5%;
  width: 6px;
  height: 6px;
  background: white;
  border-radius: 50%;
  opacity: 0.8;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
  animation: snowfall linear infinite;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 100px var(--s-4) 40px;
  max-width: 960px;
  animation: heroRise 1.4s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: var(--s-6);
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--r-full);
  border: 1px solid rgba(255, 255, 255, 0.5);
  opacity: 0;
  animation: fadeIn 1s 0.2s ease-out forwards;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--c-accent-deep);
  border-radius: 50%;
}

.eyebrow-text {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.35em;
  color: var(--c-accent-deep);
}

.hero-title {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: clamp(56px, 10vw, 128px);
  line-height: 1.05;
  letter-spacing: 0.03em;
  margin-bottom: var(--s-4);
  color: var(--c-ink);
  text-shadow: 0 2px 20px rgba(255, 255, 255, 0.5);
}

.hero-title .char-marker {
  color: var(--c-accent-deep);
  font-family: var(--f-display);
  font-style: italic;
  font-weight: 500;
}

.hero-sub {
  font-family: var(--f-sans);
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 300;
  letter-spacing: 0.25em;
  color: var(--c-ink-soft);
  margin-bottom: var(--s-8);
  opacity: 0;
  animation: fadeIn 1s 0.5s ease-out forwards;
}

.hero-actions {
  display: flex;
  gap: var(--s-2);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeIn 1s 0.7s ease-out forwards;
}

.hero-actions .btn-ghost {
  background: rgba(255, 255, 255, 0.5);
  color: var(--c-ink);
  border-color: rgba(26, 41, 64, 0.2);
}

.hero-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.8);
  border-color: var(--c-ink);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  opacity: 0;
  animation: fadeIn 1s 1.2s ease-out forwards;
}

.hero-scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(180deg, transparent 0%, rgba(26, 41, 64, 0.5) 100%);
  animation: scrollHint 2s ease-in-out infinite;
}

/* ========== 理念解释条 妙 · 纳 · 睿 ========== */
.philosophy {
  padding: var(--s-12) 0;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-alt) 100%);
  position: relative;
  overflow: hidden;
}

.philosophy::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--c-accent-mist) 0%, transparent 70%);
  opacity: 0.4;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.philosophy-item {
  text-align: center;
  padding: var(--s-3);
  position: relative;
}

.philosophy-item::after {
  content: "";
  position: absolute;
  right: -16px;
  top: 30%;
  bottom: 30%;
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, var(--c-border-strong) 50%, transparent 100%);
}

.philosophy-item:last-child::after {
  display: none;
}

.philosophy-char {
  font-family: var(--f-serif);
  font-size: 84px;
  font-weight: 700;
  color: var(--c-accent-deep);
  line-height: 1;
  margin-bottom: var(--s-2);
  background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.philosophy-en {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.35em;
  color: var(--c-ink-muted);
  margin-bottom: var(--s-2);
}

.philosophy-title {
  font-family: var(--f-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: var(--s-1);
}

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

/* ========== 章节头 ========== */
.section-head {
  margin-bottom: var(--s-8);
}

.section-head.centered {
  text-align: center;
}

.section-label {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.4em;
  color: var(--c-accent);
  margin-bottom: var(--s-2);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--f-serif);
  font-size: clamp(38px, 5.5vw, 62px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  margin-bottom: var(--s-3);
}

.section-title em {
  font-family: var(--f-display);
  font-style: italic;
  font-weight: 500;
  color: var(--c-accent-deep);
}

.section-underline {
  width: 60px;
  height: 2px;
  background: var(--c-accent);
}

.section-underline.center {
  margin: 0 auto;
}

.section-lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--c-ink-soft);
  max-width: 640px;
  margin-top: var(--s-3);
}

.section-head.centered .section-lead {
  margin-left: auto;
  margin-right: auto;
}

/* ========== 三大方向卡片 ========== */
.directions {
  padding: var(--s-16) 0;
  background: var(--c-bg);
  position: relative;
}

.directions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
  margin-top: var(--s-8);
}

.direction-card {
  position: relative;
  background: white;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s, border-color 0.3s;
  box-shadow: var(--shadow-soft);
}

.direction-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-float);
  border-color: var(--c-accent-light);
}

.direction-visual {
  height: 200px;
  position: relative;
  overflow: hidden;
}

.direction-visual-lang {
  background: linear-gradient(135deg, #7eb0dd 0%, #4a85c3 100%);
}

.direction-visual-ai {
  background: linear-gradient(135deg, #a5b8d9 0%, #4a6fa5 100%);
}

.direction-visual-travel {
  background: linear-gradient(135deg, #c5d9ec 0%, #7ea8cf 50%, #d4a574 100%);
}

/* 每个方向的装饰图形 */
.direction-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,0.3) 0%, transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.2) 0%, transparent 40%);
}

/* 网格纹理 */
.direction-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.6;
}

.direction-symbol {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--f-display);
  font-size: 68px;
  font-weight: 500;
  color: white;
  font-style: italic;
  z-index: 2;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.4s;
}

.direction-card:hover .direction-symbol {
  transform: translate(-50%, -50%) scale(1.15);
}

.direction-body {
  padding: var(--s-4);
}

.direction-tag {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--c-accent);
  margin-bottom: var(--s-1);
}

.direction-card h3 {
  font-family: var(--f-serif);
  font-size: 26px;
  font-weight: 600;
  margin-bottom: var(--s-2);
  color: var(--c-ink);
}

.direction-card p {
  font-size: 15px;
  color: var(--c-ink-soft);
  line-height: 1.8;
  margin-bottom: var(--s-3);
}

.direction-link {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--c-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, gap 0.3s;
}

.direction-card:hover .direction-link {
  border-color: var(--c-accent);
  gap: 12px;
}

/* ========== 引言区 ========== */
.quote-section {
  padding: var(--s-12) 0;
  background: var(--c-bg-alt);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.quote-section::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--c-accent-mist) 0%, transparent 50%);
  opacity: 0.3;
  z-index: 0;
}

.quote-section blockquote {
  font-family: var(--f-serif);
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 400;
  line-height: 1.7;
  color: var(--c-ink);
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.quote-mark {
  font-family: var(--f-display);
  font-size: 100px;
  font-weight: 500;
  color: var(--c-accent);
  line-height: 0.3;
  display: block;
  margin-bottom: var(--s-2);
  font-style: italic;
  opacity: 0.4;
}

.quote-section cite {
  display: block;
  font-family: var(--f-mono);
  font-style: normal;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--c-ink-soft);
  margin-top: var(--s-4);
}

/* ========== 信息发布 / 资讯 展示 ========== */
.news-section {
  padding: var(--s-16) 0;
  background: white;
}

.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
  margin-top: var(--s-8);
}

.news-card {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform 0.4s, box-shadow 0.4s, border-color 0.3s;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
  border-color: var(--c-accent-light);
}

.news-date {
  padding: var(--s-2) var(--s-3) 0;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--c-accent);
}

.news-card h3 {
  font-family: var(--f-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  padding: var(--s-2) var(--s-3);
  color: var(--c-ink);
}

.news-card p {
  padding: 0 var(--s-3) var(--s-3);
  font-size: 14px;
  color: var(--c-ink-soft);
  line-height: 1.7;
}

.news-cta {
  text-align: center;
  margin-top: var(--s-6);
}

/* ========== CTA ========== */
.cta {
  padding: var(--s-16) 0;
  background:
    linear-gradient(180deg, var(--c-bg-alt) 0%, var(--c-bg-cloud) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before,
.cta::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  opacity: 0.3;
}

.cta::before {
  top: -200px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--c-accent-mist) 0%, transparent 70%);
}

.cta::after {
  bottom: -200px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--c-accent-mist) 0%, transparent 70%);
}

.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-title {
  font-family: var(--f-serif);
  font-size: clamp(38px, 5vw, 58px);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--s-3);
  color: var(--c-ink);
}

.cta-sub {
  font-size: 18px;
  color: var(--c-ink-soft);
  margin-bottom: var(--s-6);
  line-height: 1.8;
}

/* ========== 页脚 ========== */
.footer {
  background: linear-gradient(180deg, #e8f0f7 0%, #d8e5f1 100%);
  color: var(--c-ink-soft);
  padding: var(--s-12) 0 var(--s-4);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--c-accent-light) 50%, transparent 100%);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: var(--s-8);
  padding-bottom: var(--s-8);
  border-bottom: 1px solid var(--c-border-strong);
}

.footer-brand .brand {
  color: var(--c-ink);
}

.footer-brand .brand-cn {
  font-size: 32px;
}

.footer-slogan {
  font-family: var(--f-serif);
  font-size: 16px;
  color: var(--c-ink-soft);
  margin-top: var(--s-3);
  font-weight: 400;
  letter-spacing: 0.1em;
  line-height: 1.8;
  max-width: 280px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

.footer-col h4 {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--c-ink);
  margin-bottom: var(--s-3);
  text-transform: uppercase;
}

.footer-col a,
.footer-col .footer-addr {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--c-ink-soft);
  line-height: 1.6;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--c-accent-deep);
}

.footer-bottom {
  padding-top: var(--s-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-2);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--c-ink-muted);
}

.footer-bottom a {
  color: var(--c-ink-soft);
}

.footer-bottom a:hover {
  color: var(--c-accent-deep);
}

/* ========== 内容页 Hero ========== */
.page-hero {
  padding: 160px 0 var(--s-8);
  background:
    linear-gradient(180deg, #a9d0ec 0%, #c4dff0 40%, #dfecf5 80%, #f0f6fa 100%);
  color: var(--c-ink);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero .hero-clouds {
  z-index: 1;
}

.page-hero .container {
  position: relative;
  z-index: 10;
}

.page-hero h1 {
  font-family: var(--f-serif);
  font-size: clamp(46px, 7vw, 88px);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: var(--s-3);
  color: var(--c-ink);
}

.page-hero-sub {
  font-size: 18px;
  color: var(--c-ink-soft);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.8;
}

.page-content {
  padding: var(--s-12) 0;
  background: var(--c-bg);
}

.content-block {
  max-width: 820px;
  margin: 0 auto;
}

.content-block h2 {
  font-family: var(--f-serif);
  font-size: clamp(30px, 3.8vw, 42px);
  font-weight: 600;
  line-height: 1.3;
  margin: var(--s-6) 0 var(--s-3);
  color: var(--c-ink);
  position: relative;
  padding-left: var(--s-3);
}

.content-block h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: var(--c-accent);
  border-radius: 2px;
}

.content-block h3 {
  font-family: var(--f-serif);
  font-size: 24px;
  font-weight: 600;
  margin: var(--s-4) 0 var(--s-2);
  color: var(--c-ink);
}

.content-block p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-ink);
  margin-bottom: var(--s-3);
}

.content-block ul,
.content-block ol {
  margin: var(--s-2) 0 var(--s-3) 24px;
  line-height: 1.9;
}

.content-block li {
  margin-bottom: 10px;
  color: var(--c-ink);
}

.content-block a {
  color: var(--c-accent-deep);
  border-bottom: 1px solid var(--c-accent-light);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}

.content-block a:hover {
  border-color: var(--c-accent-deep);
}

.content-pullquote {
  font-family: var(--f-serif);
  font-size: clamp(22px, 2.5vw, 30px);
  line-height: 1.7;
  font-weight: 500;
  color: var(--c-ink);
  padding: var(--s-4) var(--s-4);
  margin: var(--s-6) 0;
  background: linear-gradient(135deg, var(--c-bg-alt) 0%, var(--c-accent-mist) 100%);
  border-left: 3px solid var(--c-accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

/* ========== 联系卡 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
  margin-top: var(--s-6);
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.contact-card {
  padding: var(--s-6) var(--s-4);
  background: white;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  text-align: center;
  transition: transform 0.4s, box-shadow 0.4s, border-color 0.3s;
  box-shadow: var(--shadow-soft);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
  border-color: var(--c-accent-light);
}

.contact-icon {
  font-family: var(--f-display);
  font-size: 42px;
  color: var(--c-accent);
  margin-bottom: var(--s-2);
  font-style: italic;
  font-weight: 500;
}

.contact-card h3 {
  font-family: var(--f-serif);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--s-1);
}

.contact-card p,
.contact-card a {
  font-size: 15px;
  color: var(--c-ink-soft);
  line-height: 1.7;
}

.contact-card a {
  word-break: break-all;
}

.contact-card a:hover {
  color: var(--c-accent-deep);
}

/* ========== 登录页 ========== */
.auth-page {
  min-height: 100vh;
  padding: 120px var(--s-4) var(--s-8);
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(180deg, #c4dff0 0%, #dfecf5 50%, #f0f6fa 100%);
  position: relative;
  overflow: hidden;
}

.auth-page .hero-clouds {
  z-index: 1;
}

.auth-box {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 480px;
  padding: var(--s-8) var(--s-6);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--r-lg);
  box-shadow: 0 30px 80px -20px rgba(61, 124, 201, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.auth-logo {
  text-align: center;
  margin-bottom: var(--s-4);
}

.auth-logo .brand-cn {
  font-size: 30px;
  color: var(--c-ink);
}

.auth-logo .brand-en {
  display: block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.35em;
  color: var(--c-ink-muted);
  margin-top: 6px;
}

.auth-box h1 {
  font-family: var(--f-serif);
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 8px;
  text-align: center;
  color: var(--c-ink);
}

.auth-sub {
  text-align: center;
  color: var(--c-ink-soft);
  margin-bottom: var(--s-4);
  font-size: 15px;
}

.auth-tabs {
  display: flex;
  background: var(--c-bg-alt);
  padding: 4px;
  border-radius: var(--r-full);
  margin-bottom: var(--s-4);
}

.auth-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-ink-soft);
  cursor: pointer;
  border-radius: var(--r-full);
  transition: all 0.3s;
}

.auth-tab.active {
  background: white;
  color: var(--c-accent-deep);
  box-shadow: 0 2px 8px rgba(61, 124, 201, 0.15);
}

.form-group {
  margin-bottom: var(--s-3);
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink-soft);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 13px 16px;
  font-size: 15px;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  transition: border-color 0.2s, background 0.2s;
  font-family: inherit;
  color: var(--c-ink);
}

.form-group input:focus {
  outline: none;
  border-color: var(--c-accent);
  background: white;
  box-shadow: 0 0 0 3px rgba(61, 124, 201, 0.1);
}

.btn-submit {
  width: 100%;
  padding: 15px;
  font-size: 15px;
  font-weight: 500;
  background: var(--c-accent);
  color: white;
  border: none;
  border-radius: var(--r-full);
  cursor: pointer;
  transition: all 0.3s;
  margin-top: var(--s-2);
  letter-spacing: 0.05em;
}

.btn-submit:hover {
  background: var(--c-accent-deep);
  transform: translateY(-1px);
  box-shadow: 0 12px 30px -10px rgba(61, 124, 201, 0.5);
}

.auth-notice {
  margin-top: var(--s-4);
  padding: var(--s-2) var(--s-3);
  background: var(--c-accent-mist);
  border-radius: var(--r-sm);
  font-size: 13px;
  color: var(--c-accent-deep);
  line-height: 1.7;
}

.auth-footer {
  margin-top: var(--s-4);
  text-align: center;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.auth-footer a {
  color: var(--c-accent-deep);
  font-weight: 500;
}

/* ========== 服务列表 ========== */
.service-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  margin: var(--s-6) 0;
}

.service-item {
  padding: var(--s-4);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  background: white;
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s, box-shadow 0.3s;
}

.service-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
}

.service-item-num {
  font-family: var(--f-display);
  font-size: 38px;
  font-style: italic;
  color: var(--c-accent);
  line-height: 1;
  margin-bottom: var(--s-2);
}

.service-item h3 {
  font-family: var(--f-serif);
  font-size: 22px;
  margin-bottom: var(--s-1);
}

.service-item p {
  font-size: 14px;
  color: var(--c-ink-soft);
  line-height: 1.7;
  margin: 0;
}

/* ========== 资料中心通知 ========== */
.resource-notice {
  max-width: 720px;
  margin: var(--s-6) auto;
  padding: var(--s-4);
  background: linear-gradient(135deg, white 0%, var(--c-accent-mist) 100%);
  border: 1px solid var(--c-accent-light);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--r-md);
  text-align: left;
}

.resource-notice strong {
  font-family: var(--f-serif);
  font-size: 18px;
  color: var(--c-ink);
  display: block;
  margin-bottom: var(--s-1);
}

.resource-notice p {
  font-size: 15px;
  color: var(--c-ink-soft);
  line-height: 1.8;
  margin: 0;
}

/* ========== 动画 ========== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes heroRise {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(120vw); }
}

@keyframes snowfall {
  0% {
    transform: translateY(0) translateX(0) rotate(0deg);
    opacity: 0;
  }
  10% { opacity: 0.8; }
  90% { opacity: 0.8; }
  100% {
    transform: translateY(110vh) translateX(30px) rotate(360deg);
    opacity: 0;
  }
}

@keyframes scrollHint {
  0%, 100% { transform: scaleY(1); opacity: 0.4; }
  50% { transform: scaleY(0.5); opacity: 1; transform-origin: top; }
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--s-3);
    gap: 0;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    padding: 14px 0;
    color: var(--c-ink) !important;
    border-bottom: 1px solid var(--c-border);
    width: 100%;
    font-size: 16px;
  }

  .nav-menu a::after {
    display: none;
  }

  .nav .btn-sm {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .nav .brand,
  .nav .nav-toggle span {
    color: var(--c-ink);
    background: var(--c-ink);
  }

  .philosophy-grid,
  .directions-grid,
  .news-list {
    grid-template-columns: 1fr;
  }

  .philosophy-item::after {
    display: none;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-actions {
    flex-direction: column;
    max-width: 280px;
    margin: 0 auto;
  }

  .hero-actions .btn {
    width: 100%;
  }

  :root {
    --s-16: 80px;
    --s-12: 64px;
  }
}

@media (max-width: 500px) {
  .footer-cols {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}