/* ============================================================
   首页重设计 — style-home.css
   方向：Editorial Developer（静寂乖张 + 单一品牌蓝信号）
   不依赖 style.css / global_style.css，独立服务首页
   保留所有 JS 钩子类/id（loader / navbar / modals / projects / data-scroll-animate / mouse-x-y）
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;700&display=swap');

/* --- Design Tokens --- */
:root {
  --primary: #0a59f7;            /* 品牌蓝（盾牌/唯一信号色） */
  --primary-deep: #084ac8;
  --primary-wash: rgba(10, 89, 247, 0.08);
  --paper: #F6F7F9;              /* 冷调中性浅灰底（现代、无暖意） */
  --paper-soft: #EDEEF2;         /* 次级面 */
  --ink: #14141C;                /* 近黑正文（冷墨） */
  --ink-soft: #5C6172;           /* 冷灰文 */
  --hairline: #E2E5EC;           /* 冷灰发丝线 */
  --card-bg: #FFFFFF;            /* 卡片纯白 */
  --radius-card: 14px;
  --radius-pill: 999px;
  --shadow-soft: 0 1px 2px rgba(20,20,28,0.04);
  --shadow-hover: 0 10px 30px rgba(20,20,28,0.09);
  --ease-out: cubic-bezier(0.16, 0.84, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);
  --font-serif: 'Noto Serif SC', Georgia, 'Songti SC', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', ui-monospace, 'Menlo', monospace;
  --mouse-x: 50%;
  --mouse-y: 50%;
}

/* --- Base / Reset --- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}
body > * { position: relative; z-index: 1; }
body.no-scroll { overflow: hidden; }
::selection { background: var(--primary); color: #fff; }
/* 全局元素入场默认（配合 JS 的 IntersectionObserver/data-scroll-animate） */

/* --- Loader --- */
.loader {
  position: fixed; inset: 0;
  background: var(--paper);
  display: flex; justify-content: center; align-items: center;
  z-index: 9999; opacity: 1; visibility: visible;
  transition: opacity 0.5s var(--ease-out), visibility 0.5s var(--ease-out);
}
.loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-circle {
  width: 38px; height: 38px;
  border: 2px solid var(--primary-wash);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Navbar（极简顶部条 + 盾牌品牌） --- */
.navbar {
  background: rgba(246,247,249,0.62);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
  padding: 0.7rem 0;
}
.navbar .container-fluid { max-width: 1180px; padding: 0 28px; display: flex; align-items: center; gap: 18px; }
.navbar-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-serif);
  font-weight: 700; font-size: 17px; letter-spacing: 0.04em;
  color: var(--ink) !important; text-decoration: none;
}
.navbar-brand svg { flex-shrink: 0; }
.navbar-toggler {
  border: 1px solid var(--hairline);
  padding: 6px 10px; border-radius: 10px;
  margin-left: auto;
}
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20'%3E%3Cpath d='M3 6h14M3 10h14M3 14h14' stroke='%2314141C' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
}
.navbar-nav {
  display: flex; align-items: center; gap: 6px;
  list-style: none; padding: 0; margin: 0;
  flex-wrap: wrap;
}
.nav-item.nav-link {
  padding: 7px 14px; margin: 0;
  font: 14px/1 var(--font-sans);
  color: var(--ink-soft);
  background: none; border: 0;
  border-radius: var(--radius-pill);
  cursor: pointer; text-decoration: none;
  position: relative;
  transition: color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}
/* hover 时一条蓝色细线从中心向两端展开 */
.nav-item.nav-link::after {
  content: '';
  position: absolute; left: 50%; bottom: 2px;
  width: 0; height: 1.5px;
  background: var(--primary);
  border-radius: 1px;
  transition: width 0.35s var(--ease-out), left 0.35s var(--ease-out);
}
.nav-item.nav-link:hover { color: var(--ink); background: var(--primary-wash); }
.nav-item.nav-link:hover::after { width: 60%; left: 20%; }
#navbarNavContent { flex: 1; }

/* --- Hero（编辑式衬线座右铭为视觉主角） --- */
header {
  max-width: 1180px;
  margin: 0 auto;
  padding: 130px 28px 90px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 40px;
}
header > .hero-text { min-width: 0; }
header h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(46px, 8vw, 96px);
  line-height: 1.05; letter-spacing: 0.01em;
  margin: 0 0 16px;
  color: var(--ink);
  opacity: 0; transform: translateY(28px);
  animation: rise-in 0.9s var(--ease-out) 0.15s forwards;
}
header p {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 400;
  color: var(--ink-soft);
  margin: 0; letter-spacing: 0.14em;
  opacity: 0; transform: translateY(20px);
  animation: rise-in 0.9s var(--ease-out) 0.35s forwards;
}
@keyframes rise-in {
  to { opacity: 1; transform: translateY(0); }
}
#avatar-easter-egg {
  width: 96px; height: 96px;
  border-radius: 50%; object-fit: cover;
  border: 1px solid var(--hairline);
  cursor: pointer;
  opacity: 0; transform: scale(0.6);
  animation: avatar-in 0.8s var(--ease-spring) 0.5s forwards;
  transition: box-shadow 0.4s var(--ease-out), filter 0.4s var(--ease-out);
  filter: grayscale(0.15);
}
@keyframes avatar-in {
  to { opacity: 1; transform: scale(1); }
}
#avatar-easter-egg:hover {
  box-shadow: 0 10px 28px rgba(20,20,28,0.18);
  filter: grayscale(0);
}

/* --- Section --- */
.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.section { padding: 70px 0 30px; }
.section-header {
  font-family: var(--font-serif);
  font-size: 13px; font-weight: 500;
  letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 44px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--hairline);
  display: flex; align-items: center; gap: 14px;
}
.section-header::before {
  content: ''; width: 12px; height: 12px;
  border: 1.5px solid var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
  animation: dot-pulse 2.4s var(--ease-out) infinite;
}
@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(10,89,247,0.4); }
  50%      { box-shadow: 0 0 0 7px rgba(10,89,247,0); }
}

/* --- Project Cards（发丝边框 + 幽灵按钮 + hover 升起/去灰复色） --- */
.section-content .row { row-gap: 28px; }
.harmony-card {
  background: var(--card-bg);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 0.45s var(--ease-out), border-color 0.45s var(--ease-out);
  height: 100%;
  display: flex; flex-direction: column;
  position: relative;
}
.harmony-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(10,89,247,0.4);
}
.harmony-card .card-img-top {
  width: 100%; height: 200px;
  object-fit: cover;
  filter: grayscale(0.4) contrast(1.02);
  transition: filter 0.6s var(--ease-out);
  background: var(--paper-soft);
}
.harmony-card:hover .card-img-top { filter: grayscale(0) contrast(1); }
.harmony-card .card-body {
  padding: 24px 24px 26px;
  display: flex; flex-direction: column; gap: 12px;
  flex: 1;
}
.harmony-card .card-title {
  font-family: var(--font-serif);
  font-size: 22px; font-weight: 700;
  color: var(--ink); margin: 0;
}
.harmony-card .card-text {
  font-size: 15px; line-height: 1.6;
  color: var(--ink-soft); margin: 0 0 6px;
  flex: 1;
}
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.06em;
  padding: 4px 10px;
  color: var(--ink-soft);
  background: var(--paper-soft);
  border-radius: var(--radius-pill);
}
.project-btn {
  align-self: flex-start;
  margin-top: 6px;
  font: 14px/1 var(--font-sans);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
/* 涟漪：按钮 hover 时一道光从左掠过（无位移/无缩放） */
.project-btn::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: translateX(-120%);
  transition: transform 0.6s var(--ease-out);
  pointer-events: none;
}
.project-btn:hover:not(:disabled)::after { transform: translateX(120%); }
.project-btn:hover:not(:disabled) {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.project-btn:disabled {
  border-color: var(--hairline);
  color: var(--ink-soft);
  opacity: 0.7; cursor: not-allowed;
}

/* --- Modals（共用，沿用 script.js 的 modal-overlay / modal-content / modal-visible） --- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(27,26,23,0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9000;
  display: flex; justify-content: center; align-items: center;
  padding: 24px;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease-out), visibility 0.3s var(--ease-out);
}
.modal-overlay.modal-visible { opacity: 1; visibility: visible; }
.modal-content {
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  max-width: 460px; width: 100%;
  padding: 36px 32px;
  position: relative;
  transform: translateY(18px) scale(0.98);
  transition: transform 0.4s var(--ease-spring);
  box-shadow: 0 24px 60px rgba(27,26,23,0.22);
}
.modal-overlay.modal-visible .modal-content { transform: translateY(0) scale(1); }
.modal-content h2 {
  font-family: var(--font-serif);
  font-size: 26px; font-weight: 700;
  margin: 0 0 18px; color: var(--ink);
}
.modal-content h3 {
  font-family: var(--font-sans);
  font-size: 13px; font-weight: 500;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--ink-soft);
  margin: 26px 0 12px;
}
.modal-content p { font-size: 16px; color: var(--ink-soft); margin: 0 0 4px; }
.modal-content ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.modal-content ul li {
  font-family: var(--font-mono);
  font-size: 13px; color: var(--ink);
  padding: 8px 12px;
  background: var(--paper-soft);
  border-radius: 8px;
}
.modal-close-btn {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--paper-soft);
  border: 0; border-radius: 50%;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, transform 0.25s;
}
.modal-close-btn:hover { background: var(--primary); color: #fff; }

.contact-links { display: grid; gap: 10px; margin-top: 6px; }
.contact-btn-link {
  display: block;
  padding: 14px 18px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  text-decoration: none;
  color: var(--ink);
  font-size: 15px; font-weight: 500;
  background: var(--card-bg);
  transition: all 0.28s var(--ease-out);
}
.contact-btn-link:hover {
  border-color: var(--primary);
  background: var(--primary-wash);
  transform: translateX(4px);
}

/* --- Footer（衬线诗词为视觉主角） --- */
footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 80px 28px 56px;
  border-top: 1px solid var(--hairline);
  margin-top: 50px;
  text-align: center;
}
footer #jinrishici-sentence {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(20px, 3vw, 30px);
  color: var(--ink);
  letter-spacing: 0.08em;
  margin-bottom: 28px;
  opacity: 1 !important;
  animation: fade-in-soft 1.2s var(--ease-out) 0.3s both;
}
@keyframes fade-in-soft { from { opacity: 0; } to { opacity: 1; } }
footer span:not(#jinrishici-sentence) {
  font-size: 13px; color: var(--ink-soft);
  letter-spacing: 0.04em;
}

/* --- Scroll Reveal（沿用 data-scroll-animate / is-visible） --- */
/* --- Scroll Reveal（沿用 data-scroll-animate / is-visible，错开入场） --- */
[data-scroll-animate] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
[data-scroll-animate].is-visible { opacity: 1; transform: translateY(0); }
/* 同行卡片入场时按序号错开，形成瀑布感（用 nth-child 而非 JS） */
.harmony-card[data-scroll-animate]:nth-child(1).is-visible { transition-delay: 0.05s; }
.harmony-card[data-scroll-animate]:nth-child(2).is-visible { transition-delay: 0.12s; }
.harmony-card[data-scroll-animate]:nth-child(3).is-visible { transition-delay: 0.19s; }

/* --- Login Guide Modal（首页专用，重写在冷灰设计系统内） --- */
.login-guide-overlay {
  position: fixed; inset: 0;
  background: rgba(20,20,28,0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  z-index: 9500;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease-out), visibility 0.3s var(--ease-out);
  padding: 20px;
}
.login-guide-overlay.show { opacity: 1; visibility: visible; }
.login-guide-modal {
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  padding: 44px 40px 0;
  max-width: 460px; width: 100%; max-height: 90vh;
  display: flex; flex-direction: column;
  box-shadow: 0 24px 60px rgba(20,20,28,0.22);
  position: relative; text-align: center;
  transform: translateY(16px); opacity: 0;
  transition: transform 0.4s var(--ease-spring), opacity 0.3s ease;
}
.login-guide-overlay.show .login-guide-modal { transform: translateY(0); opacity: 1; }
.login-guide-close {
  position: absolute; top: 16px; right: 18px;
  background: var(--paper-soft); border: 0;
  width: 32px; height: 32px; border-radius: 50%;
  font-size: 1.3rem; color: var(--ink-soft);
  cursor: pointer; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.25s, color 0.25s;
}
.login-guide-close:hover { background: var(--primary); color: #fff; }
.login-guide-icon { font-size: 3rem; margin-bottom: 12px; }
.login-guide-modal h2 {
  font-family: var(--font-serif);
  color: var(--ink); margin-bottom: 8px;
  font-size: 1.6rem; font-weight: 700; line-height: 1.3;
}
.login-guide-subtitle {
  color: var(--ink-soft); margin-bottom: 24px;
  font-size: 0.95rem; line-height: 1.6;
}
.login-guide-content { flex: 1; overflow-y: auto; }
.login-guide-features { list-style: none; padding: 0; margin: 0 0 24px; text-align: left; }
.login-guide-features li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 13px 15px; margin-bottom: 8px;
  border-radius: 10px;
  background: var(--paper-soft);
  font-size: 0.92rem; color: var(--ink);
  transition: background 0.2s;
}
.login-guide-features li:hover { background: var(--primary-wash); }
.login-guide-features .feature-icon { font-size: 1.15rem; flex-shrink: 0; line-height: 1.4; }
.login-guide-features .feature-text { flex: 1; line-height: 1.5; }
.login-guide-buttons-wrapper {
  padding: 22px 40px 30px;
  margin: 0 -40px;
  border-top: 1px solid var(--hairline);
}
.login-guide-buttons { display: flex; gap: 10px; position: relative; }
.login-guide-button {
  position: relative; z-index: 1;
  flex: 1; padding: 13px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; line-height: 1;
  border: 1px solid var(--ink);
  background: transparent; color: var(--ink);
  overflow: visible;
  transition: background 0.35s var(--ease-out), color 0.35s var(--ease-out),
              border-color 0.35s var(--ease-out);
}
/* 融球渗出层：定位在按钮朝邻居一侧外缘，默认隐形 */
.login-guide-button::after {
  content: '';
  position: absolute; top: 50%;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--primary);
  filter: blur(8px);
  opacity: 0;
  transform: translate(0, -50%) scale(0.5);
  transition: opacity 0.45s var(--ease-out), transform 0.5s var(--ease-spring);
  z-index: -1;
  pointer-events: none;
}
.login-guide-button:first-child::after { right: -16px; }
.login-guide-button:last-child::after  { left: -16px; }
.login-guide-button.login-button {
  border-color: var(--primary); background: var(--primary); color: #fff;
}
.login-guide-button.login-button:hover { background: var(--primary-deep); border-color: var(--primary-deep); }
.login-guide-button.register-button:hover { background: var(--ink); color: var(--paper); }
/* hover/激活渗出蓝球——与邻居的球高斯模糊区重叠即现流体融合 */
.login-guide-button:hover::after { opacity: 0.85; transform: translate(0, -50%) scale(1); }
.login-guide-button .button-text { position: relative; z-index: 1; }

/* --- Responsive --- */
@media (max-width: 991px) {
  .navbar .container-fluid { flex-direction: row; flex-wrap: wrap; }
  #navbarNavContent { flex-basis: 100%; }
  .navbar-nav { margin-top: 12px; }
}
@media (max-width: 760px) {
  header { grid-template-columns: 1fr; padding: 92px 24px 64px; }
  #avatar-easter-egg { justify-self: start; }
  .container { padding: 0 24px; }
  .modal-content ul { grid-template-columns: 1fr; }
  .login-guide-modal { padding: 32px 24px 0; max-width: 95%; }
  .login-guide-buttons-wrapper { padding: 20px 24px 28px; margin: 0 -24px; }
  .login-guide-buttons { flex-direction: column; gap: 10px; }
  .login-guide-button { width: 100%; }
  /* 竖排时关掉横向渗出球，避免越界 */
  .login-guide-button::after { display: none; }
}

/* --- 无障碍：尊重用户「减少动效」偏好，关掉脉冲/涟漪/入场 --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  [data-scroll-animate] { opacity: 1 !important; transform: none !important; }
  header h1, header p, #avatar-easter-egg { opacity: 1 !important; transform: none !important; }
}