/* ================================================================
   GEO Audit 鈥?鍏ㄥ眬鏍峰紡锛堟繁鑹茬鎶€涓婚 路 涓巣blai.cn瀹樼綉涓€鑷达級
   浜у搧瀹氫綅锛氭櫤姣旈偦AI鎼滅储鑷姪浼樺寲骞冲彴
   ================================================================ */

/* ========== Design Tokens ========== */
:root {
  /* 鑳屾櫙鑹?鈥?娣卞簳 + 姣涚幓鐠冨崱鐗?*/
  --bg-page:        #0A0F1E;
  --bg-card:        rgba(255, 255, 255, 0.72);
  --bg-card-hover:  rgba(255, 255, 255, 0.85);
  --bg-elevated:    rgba(255, 255, 255, 0.88);
  --bg-input:       rgba(248, 250, 252, 0.85);

  /* 鍝佺墝鑹?*/
  --cyan:           #00D4FF;
  --cyan-dim:       rgba(0, 212, 255, 0.08);
  --cyan-glow:      rgba(0, 212, 255, 0.18);
  --purple:         #7B61FF;
  --purple-dim:     rgba(123, 97, 255, 0.08);
  --blue:           #3B82F6;

  /* 鏂囧瓧锛堟瘺鐜荤拑鍗＄墖涓婏級 */
  --text-primary:   #0F172A;
  --text-secondary: #475569;
  --text-muted:     #64748B;

  /* 杈规 鈥?鍗婇€忚瀺鍚?*/
  --border:         rgba(255, 255, 255, 0.18);
  --border-hover:   rgba(0, 212, 255, 0.35);
  --border-focus:   var(--cyan);
  
  /* 灏哄 */
  --radius-sm:      8px;
  --radius-md:      12px;
  --radius-lg:      16px;
  --radius-xl:      24px;
  
  /* 闃村奖 */
  --shadow-sm:      0 2px 8px rgba(0,0,0,0.2);
  --shadow-md:      0 8px 30px rgba(0,0,0,0.3);
  --shadow-lg:      0 20px 60px rgba(0,0,0,0.4);
  --glow-cyan:      0 0 30px rgba(0,212,255,0.15), 0 0 60px rgba(0,212,255,0.08);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 鑳屾櫙瑁呴グ */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 212, 255, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(123, 97, 255, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 0% 80%, rgba(59, 130, 246, 0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: #fff; }

/* ========== 瀵艰埅鏍?========== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: all 0.35s ease;
  border-bottom: 1px solid transparent;
  /* 濮嬬粓淇濇寔涓嶉€忔槑鑳屾櫙锛屽交搴曢殧缁濇粴鍔ㄥ唴瀹圭┛閫?*/
  background-color: #0A0F1E;
}
/* 瀵艰埅鏍忎笅鏂规笎闅愰槾褰辨潯锛岃瑙夎繃娓?*/
.navbar::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  height: 20px;
  background: linear-gradient(to bottom, rgba(10,15,30,0.9), rgba(10,15,30,0));
  z-index: -1;
  pointer-events: none;
}
.navbar.scrolled {
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.nav-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.nav-logo:hover { opacity: 0.9; }

.nav-logo-icon {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #F1F5F9;
  white-space: nowrap;
}
/* 产品名右侧分隔线+副标题（桌面端横排显示） */
.nav-logo-divider {
  color: rgba(148,163,184,0.4);
  font-size: 14px;
  font-weight: 300;
  user-select: none;
  white-space: nowrap;
}
.nav-logo-tagline-inline {
  font-size: 12px;
  color: rgba(148,163,184,0.7);
  font-weight: 400;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  padding: 7px 11px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(241,245,249,0.75);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.25s ease;
  position: relative;
}
.nav-link:hover {
  color: var(--cyan);
  background: var(--cyan-dim);
}
/* 褰撳墠椤甸珮浜?*/
.nav-link.active {
  color: var(--cyan);
  background: var(--cyan-dim);
}
/* 鏈€鍚庝竴涓摼鎺ヤ笉鍐嶇壒娈婃牱寮?*/
.nav-link:last-child {
  background: none;
  color: rgba(241,245,249,0.75);
  font-weight: 500;
  box-shadow: none;
}
.nav-link:last-child:hover {
  color: var(--cyan);
  background: var(--cyan-dim);
  transform: none;
}

/* ========== 涓诲唴瀹?========== */
.main-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 28px 100px;
}

/* 浜岀骇椤甸潰锛氶澶栭《閮ㄩ棿璺濓紝閬垮厤琚浐瀹氬鑸爮閬尅 */
.main-content--subpage {
  padding-top: 104px;
}

/* ========== Hero 鍖哄煙 ========== */
.hero-section {
  position: relative;
  text-align: center;
  padding: 140px 0 60px;
  min-height: auto;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 80%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 80%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  z-index: 2;
}

.hero-title {
  font-size: clamp(52px, 7vw, 76px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1.5px;
  margin-bottom: 28px;
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(148,163,184,0.9);
  max-width: 660px;
  margin: 0 auto 44px;
  line-height: 1.8;
  font-weight: 300;
}
.hero-subtitle-highlight {
  font-weight: 600;
  color: #E2E8F0;
  font-size: 1.06em;
}

/* ========== Hero 动画效果 ========== */

/* 标题入场：上浮+淡入 */
.hero-title {
  position: relative;
  display: inline-block;
  overflow: hidden;
  opacity: 0;
  transform: translateY(36px);
  animation: heroTitleIn 0.9s cubic-bezier(.16,1,.3,1) 0.15s forwards;
}
@keyframes heroTitleIn {
  to { opacity: 1; transform: translateY(0); }
}

/* 标题下方呼吸光条 */
.hero-glow-line {
  width: 140px;
  height: 4px;
  margin: 0 auto 28px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--cyan));
  background-size: 200% 100%;
  box-shadow: 0 0 16px rgba(0,212,255,0.5), 0 0 40px rgba(0,212,255,0.18);
  opacity: 0;
  animation: glowLineIn 0.6s ease 1.6s forwards, glowLinePulse 2.8s ease-in-out 2.2s infinite;
}
@keyframes glowLineIn {
  to { opacity: 1; transform: scaleX(1); }
}
@keyframes glowLinePulse {
  0%, 100% { transform: scaleX(1); opacity: 0.7; }
  50% { transform: scaleX(1.15); opacity: 1; background-position: 100% 0; box-shadow: 0 0 24px rgba(0,212,255,0.6), 0 0 56px rgba(123,97,255,0.22); }
}

/* 副标题初始隐藏 + 入场 */
.hero-subtitle {
  opacity: 0;
  transform: translateY(20px);
  animation: subtitleIn 0.7s ease 1s forwards;
}
@keyframes subtitleIn {
  to { opacity: 1; transform: translateY(0); }
}

/* 浮动粒子容器 — 置于网格之上、文字之下 */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}
.hero-particle {
  position: absolute;
  border-radius: 50%;
  /* 初始可见，不依赖动画才显示 */
  opacity: 0.8;
  animation: particleFloat linear infinite;
}
@keyframes particleFloat {
  0% {
    transform: translateY(30px) scale(0.3);
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  80% {
    opacity: 0.7;
  }
  100% {
    opacity: 0;
    transform: translateY(-160px) scale(1.2);
  }
}

/* ========== 妯″潡瀹瑰櫒锛堢粺涓€4涓ā鍧楃殑澶撮儴+鍐呭鍖呰锛?========== */
.module-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 40px 36px;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.18),
    0 0 60px rgba(0, 212, 255, 0.03),
    0 0 0 1px rgba(255,255,255,0.08) inset;
}

.module-header {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.module-title {
  font-size: clamp(26px, 2.5vw, 32px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.module-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 540px;
  margin: 0 auto;
}

/* features-section .module-container padding removed — unified with default */

/* ========== 杈撳叆鍗＄墖 鈥?宓屽鍦╩odule-container鍐?========== */
.input-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  animation: cardReveal 0.8s ease both;
}
@keyframes cardReveal {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

.input-tabs {
  display: flex;
  gap: 2px;
  background: rgba(255, 255, 255, 0.45);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 8px 10px;
  border: none;
  background: transparent;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.25s ease;
  font-family: inherit;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  white-space: nowrap;
  line-height: 1.4;
}
.tab-btn.active {
  background: #fff;
  color: #0F172A;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.tab-btn:hover:not(.active) {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.25);
}

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

textarea#article-text {
  width: 100%;
  min-height: 200px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 14px;
  font-family: 'JetBrains Mono', 'Noto Sans SC', monospace;
  line-height: 1.7;
  resize: vertical;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.7);
  transition: border-color 0.25s, box-shadow 0.25s;
}
textarea#article-text::placeholder { color: var(--text-muted); font-family: 'Inter', 'Noto Sans SC', sans-serif; }
textarea#article-text:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}

.text-counter {
  text-align: right;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  font-family: 'JetBrains Mono', monospace;
}

.url-input {
  width: 100%;
  padding: 13px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.7);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.url-input::placeholder { color: var(--text-muted); }
.url-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}
.url-hint {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 10px;
}

/* 鏂囦欢涓婁紶 */
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 44px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  background: rgba(248, 250, 252, 0.5);
}
.file-upload-area:hover {
  border-color: var(--cyan);
  background: var(--cyan-dim);
}
.upload-icon { font-size: 36px; margin-bottom: 12px; display: block; }
.upload-link { color: var(--cyan); cursor: pointer; }
.file-hint { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

.file-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(0, 212, 255, 0.1);
  border-radius: var(--radius-sm);
  margin-top: 12px;
  border: 1px solid rgba(0, 212, 255, 0.15);
}
.file-name { font-size: 14px; color: #0891B2; font-weight: 500; }
.file-remove {
  background: none; border: none;
  font-size: 16px; color: var(--text-muted);
  cursor: pointer; padding: 4px;
  transition: color .2s;
}
.file-remove:hover { color: var(--text-primary); }

/* 鎿嶄綔鎸夐挳 */
.action-buttons {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.btn-icon { font-size: 16px; }

.btn-primary {
  flex: 1;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: #fff;
  color: var(--cyan);
  border: 1.5px solid rgba(0, 212, 255, 0.35);
}
.btn-outline:hover {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--cyan);
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.15);
}

/* ========== 鍔熻兘妯″潡鍖?========== */
.features-section {
  margin-bottom: 44px;
}
.section-inner { max-width: 1200px; margin: 0 auto; }

.section-title {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}
.section-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 48px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: all 0.4s cubic-bezier(.25,.46,.45,.94);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 4px 16px rgba(0,0,0,0.08),
    0 0 0 1px rgba(255,255,255,0.06) inset;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow:
    0 20px 40px rgba(0,0,0,0.12),
    0 0 30px rgba(0,212,255,0.06),
    0 0 0 1px rgba(255,255,255,0.1) inset;
  background: var(--bg-card-hover);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  font-size: 36px;
  margin-bottom: 18px;
  display: inline-block;
  filter: grayscale(0.2);
}
.feature-name {
  font-size: 17px;
  font-weight: 650;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.2px;
}
.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 20px;
}

.status-available {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.15);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
  margin-bottom: 18px;
  align-self: flex-start;
}
.status-coming {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(123, 97, 255, 0.12);
  color: #7C3AED;
  border: 1px solid rgba(123, 97, 255, 0.22);
  margin-bottom: 18px;
  align-self: flex-start;
}

.btn-feature {
  width: 100%;
  padding: 11px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
}
.btn-feature:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(0, 212, 255, 0.35);
}
.btn-feature-disabled {
  width: 100%;
  padding: 11px;
  background: rgba(255, 255, 255, 0.35);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.25s ease;
}
.btn-feature-disabled:hover {
  background: rgba(255, 255, 255, 0.5);
  color: var(--text-secondary);
}

/* ========== 鏂规硶璁鸿鏄庡尯 ========== */
.methodology-section {
  margin-bottom: 44px;
}
.methodology-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 44px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.18),
    0 0 0 1px rgba(255,255,255,0.08) inset,
    0 0 60px rgba(0, 212, 255, 0.03);
}
.methodology-inner > * { position: relative; }

.methodology-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.method-item {
  text-align: left;
  padding: 24px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.35s ease;
}
.method-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.08);
  background: rgba(255, 255, 255, 0.75);
}

.method-number {
  font-size: 42px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -2px;
}
.method-item h4 {
  font-size: 15.5px;
  font-weight: 650;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.2px;
}
.method-item p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ========== 鍊欒ˉ鍚嶅崟寮圭獥 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 10, 25, 0.65);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: overlayIn 0.2s ease;
}
@keyframes overlayIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 42px 36px;
  max-width: 460px;
  width: 92%;
  position: relative;
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  box-shadow:
    0 24px 48px rgba(0,0,0,0.2),
    0 0 80px rgba(0, 212, 255, 0.05);
  animation: modalUp 0.35s cubic-bezier(.34,1.56,.64,1);
}
@keyframes modalUp {
  from { opacity: 0; transform: scale(0.95) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--border);
  width: 32px; height: 32px;
  border-radius: 50%;
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
}
.modal-close:hover { background: rgba(255, 255, 255, 0.65); color: var(--text-primary); }

.modal-icon { font-size: 44px; text-align: center; margin-bottom: 16px; }
.modal-title {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 12px;
}
.modal-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.7;
  margin-bottom: 6px;
}
.modal-desc strong { color: var(--cyan); }
.modal-subdesc {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 24px;
}

.modal-input-group {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}
.modal-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(248, 250, 252, 0.8);
  transition: border-color 0.25s;
}
.modal-input::placeholder { color: var(--text-muted); }
.modal-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}

.modal-footer {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}
.modal-divider { margin: 0 8px; color: var(--border); }
.btn-link {
  background: none;
  border: none;
  color: var(--cyan);
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
}
.btn-link:hover { text-decoration: underline; }

.modal-success {
  background: rgba(16, 185, 129, 0.1);
  color: #34D399;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  text-align: center;
  margin-top: 16px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ========== 椤佃剼 ========== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  background: rgba(10, 15, 30, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-logo-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
}
.footer-brand span {
  font-size: 15px;
  font-weight: 600;
  color: #F1F5F9;
  white-space: nowrap;
}
.footer-desc {
  font-size: 13.5px;
  color: rgba(148,163,184,0.75);
  max-width: 480px;
  margin: 0 auto 16px;
  line-height: 1.7;
}
.footer-copy {
  font-size: 12px;
  color: rgba(100,116,139,0.5);
}
.footer-copyright {
  font-size: 11px;
  color: rgba(100,116,139,0.35);
  margin-top: 6px;
}

/* ========== 婊氬姩鏉＄編鍖?========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(148,163,184,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148,163,184,0.3); }

/* ========== Selection ========== */
::selection {
  background: rgba(0, 212, 255, 0.25);
  color: #fff;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .methodology-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  /* 二级页面：移动端导航栏可能更高，增加顶部间距防遮挡 */
  .main-content--subpage { padding-top: 130px; }
  .hero-section { padding: 100px 0 40px; }
  .hero-title { font-size: 34px; letter-spacing: -0.8px; }
  .hero-subtitle { font-size: 15px; max-width: 92%; margin-left: auto; margin-right: auto; }
  .input-card { padding: 24px 20px 20px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .feature-card { padding: 20px 16px; }
  /* 桌面导航隐藏，显示汉堡按钮 */
  .nav-links { display: none !important; }
  .nav-hamburger { display: flex !important; }
  /* Logo 紧凑化：显示图标+英文+短副标题 */
  .nav-logo-tagline-inline { font-size: 11px; max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .nav-logo-divider { font-size: 12px; }
  .nav-logo-name { font-size: 18px; font-weight: 700; }
  .nav-logo-icon { width: 36px; height: 36px; }
  .hero-title { font-size: 40px; line-height: 1.2; letter-spacing: -0.8px; }
  .action-buttons { flex-direction: column; }
  .methodology-grid { grid-template-columns: 1fr 1fr; }
  .methodology-inner { padding: 28px 18px; }
  .main-content { padding: 60px 16px 60px; }

  /* 全局模块容器：移动端收紧内边距 */
  .module-container { padding: 28px 16px 24px; }
  .module-title { font-size: 21px !important; letter-spacing: -0.3px; }
  .module-desc { font-size: 13px; line-height: 1.7; max-width: 95%; }

  /* 页脚移动端缩小 */
  .site-footer { padding: 24px 16px; }
  .footer-brand { gap: 8px; margin-bottom: 10px; }
  .footer-logo-icon { width: 26px; height: 26px; }
  .footer-brand span { font-size: 13px !important; white-space: nowrap; }
  .footer-copy { font-size: 11.5px; }
  .footer-copyright { font-size: 10px; }

  /* 理论模块：去掉内层容器的水平内边距，让卡片宽度与上方对齐 */
  .methodology-inner { padding: 20px 0; }
}

@media (max-width: 480px) {
  /* 二级页面超窄屏：进一步加大顶部间距 */
  .main-content--subpage { padding-top: 120px; }
  .hero-title { font-size: 32px; letter-spacing: -0.5px; line-height: 1.22; }
  .hero-subtitle { font-size: 15px; line-height: 1.8; padding: 0 10px; }
  /* 保持双列布局，不坍塌为单列 */
  .features-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .methodology-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .geo-series-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .nav-logo-name { font-size: 16px; }
  .nav-logo-icon { width: 32px; height: 32px; }
  /* 超窄屏：中文副标题不隐藏，缩小显示 */
  .nav-logo-tagline-inline {
    font-size: 9px;
    letter-spacing: 0;
    max-width: 110px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .nav-logo-divider { font-size: 10px; }

  /* 功能卡片 & 方法论卡片：双列模式下收紧 */
  .feature-card { padding: 18px 14px; }
  .feature-icon { font-size: 28px; margin-bottom: 10px; }
  .feature-name { font-size: 15px; margin-bottom: 6px; }
  .feature-desc { font-size: 12.5px; line-height: 1.55; }
  .feature-card-icon { width: 36px; height: 36px; }
  .method-item { padding: 18px 14px; }
  .method-item h4 { font-size: 13.5px; margin-bottom: 6px; }
  .method-item p { font-size: 12px; line-height: 1.55; }

  /* 文章卡片紧凑化：缩短封面比例 + 收紧内边距 */
  .geo-card-cover { aspect-ratio: 16 / 9; }
  .geo-card-body { padding: 10px 12px 14px; }
  .geo-card-title { font-size: 13px; margin-bottom: 4px; }
  .geo-card-desc { font-size: 11.5px; line-height: 1.5; margin-bottom: 8px;
    /* 限制描述文字最多显示3行，超出截断 */
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
  .geo-card-link { font-size: 11.5px; }
  .geo-card-badge { width: 22px; height: 22px; font-size: 11px; line-height: 22px; top: 8px; left: 8px; }

  /* 副标题断行优化：防止尾部孤字 */
  .section-subtitle, .module-desc {
    max-width: 92%;
  }

  /* 页脚超窄屏进一步缩小 */
  .footer-brand span { font-size: 12px !important; white-space: nowrap; }
  .footer-logo-icon { width: 24px; height: 24px; }
  .footer-copy { font-size: 10.5px; }
  .footer-copyright { font-size: 9.5px; }
}

/* ========== 移动端汉堡按钮 ========== */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: none;
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: 8px;
  cursor: pointer;
  padding: 0;
  transition: all 0.25s ease;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 18px;
  height: 1.8px;
  background: rgba(148,163,184,0.9);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-hamburger:hover {
  border-color: rgba(0,212,255,0.55);
  background: rgba(0,212,255,0.06);
}
.nav-hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== 移动端二级菜单（右侧滑入） ========== */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(280px, 75vw);
  background: #0F172A;
  z-index: 9999;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(.22,1,.36,1);
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 32px rgba(0,0,0,0.3);
  overflow: hidden;
}
.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}
.mobile-menu-brand {
  font-size: 14px;
  font-weight: 600;
  color: #E2E8F0;
  letter-spacing: -0.3px;
}
.mobile-menu-brand small {
  font-weight: 400;
  font-size: 12px;
  color: #64748B;
  margin-left: 4px;
}
.mobile-menu-close {
  background: none;
  border: none;
  color: #94A3B8;
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

.mobile-menu-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}
.mobile-menu-item {
  display: block;
  padding: 14px 24px;
  color: #CBD5E1;
  font-size: 15px;
  text-decoration: none;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}
.mobile-menu-item:hover,
.mobile-menu-item.active {
  background: rgba(0,212,255,0.08);
  color: #00D4FF;
  border-left-color: #00D4FF;
}
.mobile-menu-item--external {
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 8px;
  padding-top: 16px;
}

/* GEO鏂规硶璁烘ā鍧楋紙module-container鍐咃紝绱у噾鐗堬級 */
.geo-series-section {
  margin-bottom: 0;
}

/* 妯″潡4澶嶇敤 .module-container 榛樿 padding锛?0px 40px 36px锛夛紝涓嶅仛鐗规畩瑕嗙洊 */

/* GEO系列卡片 */
.geo-series-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 28px auto 0;
}

/* 鍗＄墖锛氱揣鍑戞瘺鐜荤拑 */
.geo-card {
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.35s cubic-bezier(.25,.46,.45,.94);
  box-shadow:
    0 6px 20px rgba(0,0,0,0.14),
    0 0 0 1px rgba(255,255,255,0.06) inset;
}
.geo-card:hover {
  transform: translateY(-5px);
  background: rgba(255,255,255,0.75);
  border-color: rgba(0,212,255,0.35);
  box-shadow:
    0 16px 38px rgba(0,0,0,0.2),
    0 0 28px rgba(0,212,255,0.08);
}

/* 灏侀潰鍥撅細鏇寸揣鍑戠殑姣斾緥 */
.geo-card-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: rgba(0,0,0,0.12);
}
.geo-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}
.geo-card:hover .geo-card-cover img {
  transform: scale(1.04);
}

/* 鍦嗗湀鏁板瓧鏍囪 鈶犫憽鈶⑩懀 */
.geo-card-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  line-height: 26px;
  text-align: center;
  color: #fff;
  background: linear-gradient(135deg, rgba(0,212,255,0.85), rgba(123,97,255,0.85));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.22);
  pointer-events: none;
}

/* 鏂囧瓧鍖猴細绱у噾 */
.geo-card-body {
  padding: 14px 16px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.geo-card-title {
  font-size: 14.5px;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 6px;
  line-height: 1.4;
  transition: color 0.25s ease;
}
.geo-card:hover .geo-card-title {
  color: #0078D2;
}
.geo-card-desc {
  font-size: 12.5px;
  color: #475569;
  line-height: 1.58;
  flex: 1;
  margin-bottom: 12px;
}
.geo-card-link {
  font-size: 12.5px;
  font-weight: 600;
  color: #0078D2;
  transition: all 0.25s ease;
  display: inline-block;
}
.geo-card:hover .geo-card-link {
  transform: translateX(3px);
}

/* ========== 浮动客服按钮（右下角） ========== */
.floating-help-btn {
  position: fixed;
  right: 24px;
  bottom: 28px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00D4FF 0%, #7B61FF 100%);
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  z-index: 9997;
  box-shadow: 0 6px 24px rgba(0,212,255,0.35);
  transition: transform .25s ease, box-shadow .25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.floating-help-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 10px 36px rgba(0,212,255,0.45);
}

.help-panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2,6,23,0.55);
  backdrop-filter: blur(8px);
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
}
.help-panel-overlay.active {
  opacity: 1;
  visibility: visible;
}
.help-panel {
  position: absolute;
  right: 20px;
  bottom: 90px;
  background: #fff;
  border-radius: 16px;
  padding: 28px 26px 22px;
  width: 260px;
  text-align: center;
  box-shadow: 0 16px 48px rgba(0,0,0,0.18), 0 4px 12px rgba(0,0,0,0.08);
  transform: translateY(12px) scale(0.96);
  transition: transform .3s cubic-bezier(.25,.46,.45,.94);
}
.help-panel-overlay.active .help-panel {
  transform: translateY(0) scale(1);
}
.help-panel-close {
  position: absolute;
  top: 8px;
  right: 10px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: #F1F5F9;
  color: #64748B;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s ease;
}
.help-panel-close:hover { background: #E2E8F0; }
.help-panel-icon {
  font-size: 36px;
  margin-bottom: 12px;
  line-height: 1;
}
.help-panel-title {
  font-size: 17px;
  font-weight: 800;
  color: #1E293B;
  margin-bottom: 6px;
}
.help-panel-desc {
  font-size: 13px;
  color: #64748B;
  line-height: 1.65;
  margin-bottom: 16px;
}
.help-qr-wrap {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 14px;
}
.help-qr-wrap img {
  width: 160px;
  height: 160px;
  border-radius: 6px;
  object-fit: contain;
}
.help-qr-label {
  font-size: 11.5px;
  color: #94A3B8;
  margin-top: 8px;
  letter-spacing: 0.5px;
}
.help-hint {
  font-size: 12px;
  color: #00D4FF;
  font-weight: 600;
}



/* 官网首页外部链接 */
.nav-link--external {
  margin-left: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: 20px;
  font-size: 13px;
  color: rgba(0,212,255,0.85);
}
.nav-link--external:hover {
  background: rgba(0,212,255,0.08);
  border-color: rgba(0,212,255,0.5);
  color: #00D4FF;
}
.nav-link--external::after {
  content: " ↗";
  font-size: 11px;
}