/* ============================================================
   Niney · 蒲钰娇 个人名片网站
   暗色 + 玻璃质感 + 一点超现实主义
   配色与间距统一用 CSS 变量管理
   ============================================================ */

:root {
  /* 底色 */
  --bg: #08080d;
  --bg-soft: #0e0e16;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);

  /* 文字 */
  --text: #f2f1f7;
  --text-soft: #b9b7c8;
  --text-dim: #807e92;

  /* 虹彩强调色 */
  --iris-1: #7c5cff; /* 紫 */
  --iris-2: #38d0ff; /* 青 */
  --iris-3: #ff6ec7; /* 品红 */
  --iris-grad: linear-gradient(110deg, var(--iris-2), var(--iris-1) 45%, var(--iris-3));

  /* 尺寸 */
  --maxw: 1120px;
  --radius: 18px;
  --radius-lg: 26px;
  --blur: 18px;

  /* 字体 */
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui,
    -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-en: "Helvetica Neue", Arial, system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 背景渐变氛围 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 50% at 15% 10%, rgba(124, 92, 255, 0.18), transparent 70%),
    radial-gradient(55% 50% at 90% 20%, rgba(56, 208, 255, 0.14), transparent 70%),
    radial-gradient(70% 60% at 70% 100%, rgba(255, 110, 199, 0.12), transparent 70%),
    var(--bg);
}

/* 首屏动效画布 */
#aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.9;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
video {
  display: block;
  max-width: 100%;
}

/* ---------- 通用排版 ---------- */
.eyebrow {
  font-family: var(--font-en);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--iris-2);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* ---------- 玻璃卡片基类 ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  padding: 28px;
  transition: transform 0.35s ease, border-color 0.35s ease,
    box-shadow 0.35s ease, background 0.35s ease;
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(18px, 5vw, 48px);
  background: rgba(8, 8, 13, 0.45);
  border-bottom: 1px solid var(--border);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.brand {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}
.brand span {
  font-family: var(--font);
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.9rem;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  gap: clamp(14px, 2.4vw, 30px);
  font-size: 0.92rem;
}
.nav-links a {
  color: var(--text-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.25s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1.5px;
  background: var(--iris-grad);
  transition: width 0.3s ease;
}
.nav-links a:hover {
  color: var(--text);
}
.nav-links a:hover::after {
  width: 100%;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
}
.hero-inner {
  max-width: 760px;
}
.hero-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin: 6px 0 18px;
}
.hero-title .en {
  font-family: var(--font-en);
  font-size: clamp(3.4rem, 12vw, 8rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  background: var(--iris-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-title .cn {
  font-size: clamp(1.3rem, 4vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--text-soft);
  padding-left: 0.35em;
}
.hero-slogan {
  font-size: clamp(1rem, 2.6vw, 1.35rem);
  color: var(--text-soft);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--iris-grad);
  color: #0a0a12;
  box-shadow: 0 8px 30px rgba(124, 92, 255, 0.35);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(124, 92, 255, 0.5);
}
.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  transform: translateY(-3px);
  border-color: var(--iris-2);
}

.scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-hint span {
  width: 4px;
  height: 8px;
  border-radius: 4px;
  background: var(--iris-2);
  animation: scrolldot 1.6s ease-in-out infinite;
}
@keyframes scrolldot {
  0% { opacity: 0; transform: translateY(0); }
  40% { opacity: 1; }
  80% { opacity: 0; transform: translateY(12px); }
  100% { opacity: 0; }
}

/* ---------- About（视频背景）---------- */
.about {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.about-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.about-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 75% center;
  opacity: 0; /* 初始「无」，随滚动浮现 */
  will-change: opacity;
}
/* 左侧暗渐变，保证文字可读、并和暗色风格统一 */
.about-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--bg) 12%, rgba(8, 8, 13, 0.72) 42%, rgba(8, 8, 13, 0.15) 75%),
    linear-gradient(0deg, var(--bg), transparent 30%, transparent 70%, rgba(8, 8, 13, 0.6));
}
.about-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 140px clamp(20px, 5vw, 48px);
}
.about-inner .section-title {
  max-width: 14em;
}
.about-copy {
  margin-top: 22px;
  max-width: 36em;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
}

/* ---------- 通用 section ---------- */
.section {
  padding: clamp(70px, 11vw, 130px) clamp(20px, 5vw, 48px);
}
.section-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}
.section-head {
  margin-bottom: 48px;
}

/* ---------- Work ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.work-card {
  padding: 34px;
}
.card-index {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--iris-2);
}
.work-card h3 {
  font-size: 1.3rem;
  margin: 14px 0 6px;
}
.card-meta {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.work-card p:last-child {
  color: var(--text-soft);
}
.work-card:hover {
  transform: translateY(-6px);
  border-color: rgba(124, 92, 255, 0.5);
  background: var(--surface-strong);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

/* 可点击作品卡 */
.work-link {
  display: flex;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
}
.work-link p:not(.card-meta) {
  color: var(--text-soft);
}
.work-cta {
  margin-top: auto;
  padding-top: 18px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--iris-2);
  transition: color 0.3s ease;
}
.work-link:hover .work-cta {
  color: var(--iris-3);
}

/* ---------- 笔记 ---------- */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.note-card {
  color: var(--text-soft);
  position: relative;
}
.note-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}
.note-title::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  vertical-align: middle;
  margin-right: 10px;
  background: var(--iris-grad);
}
.placeholder-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--iris-3);
  border: 1px solid rgba(255, 110, 199, 0.4);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 14px;
}
.note-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
}

/* ---------- 文章 ---------- */
.writing-list {
  list-style: none;
  border-top: 1px solid var(--border);
}
.writing-item {
  padding: 26px 8px;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.3s ease, background 0.3s ease;
}
.writing-item h3 {
  font-size: 1.18rem;
  font-weight: 600;
  margin-bottom: 6px;
  transition: color 0.3s ease;
}
.writing-item p {
  color: var(--text-dim);
  font-size: 0.96rem;
}
.writing-item:hover {
  padding-left: 18px;
  background: linear-gradient(90deg, var(--surface), transparent);
}
.writing-item:hover h3 {
  background: var(--iris-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 联系 ---------- */
.contact {
  text-align: center;
}
.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.contact-mail {
  margin-top: 26px;
  font-family: var(--font-en);
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 600;
  background: var(--iris-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: opacity 0.25s ease;
}
.contact-mail:hover {
  opacity: 0.75;
}

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 760px) {
  html {
    scroll-padding-top: 70px;
  }
  .nav-links {
    gap: 14px;
    font-size: 0.82rem;
  }
  .brand span {
    display: none;
  }

  .work-grid,
  .notes-grid {
    grid-template-columns: 1fr;
  }

  /* About 手机端：视频铺满，整体压暗，文字置于其上 */
  .about-media video {
    object-position: 70% center;
  }
  .about-scrim {
    background:
      linear-gradient(180deg, rgba(8, 8, 13, 0.5), rgba(8, 8, 13, 0.82)),
      linear-gradient(90deg, var(--bg), rgba(8, 8, 13, 0.3));
  }
  .about-inner {
    padding: 110px 20px;
  }
}

@media (max-width: 420px) {
  .nav-links {
    gap: 11px;
    font-size: 0.78rem;
  }
}

/* 尊重「减少动态效果」偏好 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .scroll-hint span {
    animation: none;
  }
}