/* ============================================================
   云码小栈 · devbit.cn
   主题：墨色云海 × 终端客栈
   ============================================================ */

:root {
  --ink-900: #080b0f;   /* 墨黑底 */
  --ink-800: #0d1117;
  --ink-700: #141a22;
  --line:    rgba(231, 228, 218, 0.10);
  --line-strong: rgba(231, 228, 218, 0.22);

  --paper:   #e9e5d8;   /* 暖纸白 */
  --paper-soft: #b8b4a7;
  --paper-dim:  #7d817e;

  --jade:    #63e6d2;   /* 青玉 · 主色 */
  --jade-dim: #3aa898;
  --amber:   #f0b264;   /* 暖琥珀 */
  --vermilion: #c9493f; /* 印章朱红 */

  --font-serif: "Noto Serif SC", "Songti SC", serif;
  --font-sans:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono:  "JetBrains Mono", "Consolas", monospace;

  --nav-h: 68px;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 细腻纸噪 + 全局色调 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(99, 230, 210, 0.05), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(240, 178, 100, 0.04), transparent 60%);
}

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

::selection { background: rgba(99, 230, 210, 0.25); color: #fff; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background .35s ease, border-color .35s ease, backdrop-filter .35s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(8, 11, 15, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav__inner {
  max-width: 1180px;
  height: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand { display: flex; align-items: center; gap: 12px; }
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  background: var(--vermilion);
  color: #f5efe2;
  font-family: var(--font-serif);
  font-size: 20px;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(201, 73, 63, .35);
}
.nav__name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .15em;
}
.nav__links { display: flex; gap: 34px; }
.nav__links a {
  position: relative;
  font-size: 15px;
  color: var(--paper-soft);
  padding: 6px 2px;
  transition: color .25s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--jade);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.nav__links a:hover { color: var(--paper); }
.nav__links a.is-active { color: var(--jade); }
.nav__links a.is-active::after { transform: scaleX(1); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8,11,15,.85) 0%, rgba(8,11,15,.45) 35%, rgba(8,11,15,.72) 72%, var(--ink-900) 100%),
    linear-gradient(90deg, rgba(8,11,15,.78) 0%, rgba(8,11,15,.25) 55%, rgba(8,11,15,.55) 100%);
}
.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: calc(var(--nav-h) + 30px) 32px 90px;
}
.hero__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--jade);
  margin: 0 0 18px;
}
.hero__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(3.4rem, 11vw, 8.5rem);
  line-height: 1.05;
  letter-spacing: .08em;
  margin: 0;
  background: linear-gradient(180deg, #f7f3e7 20%, #c9c3b2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 60px rgba(99, 230, 210, .08);
}
.hero__sub {
  margin: 22px 0 34px;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--paper-soft);
  letter-spacing: .08em;
}

/* 终端窗口 */
.terminal {
  max-width: 600px;
  background: rgba(10, 14, 19, .82);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  box-shadow: 0 24px 70px rgba(0,0,0,.5);
  overflow: hidden;
  backdrop-filter: blur(6px);
}
.terminal__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--line);
}
.terminal__dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #2c333c;
}
.terminal__dot:nth-child(1) { background: #e0655b; }
.terminal__dot:nth-child(2) { background: #e5b85c; }
.terminal__dot:nth-child(3) { background: #6bcf7f; }
.terminal__title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--paper-dim);
}
.terminal__body {
  padding: 16px 18px 18px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.9;
  min-height: 168px;
  color: var(--paper-soft);
  word-break: break-all;
}
.t-line .t-prompt { color: var(--jade); }
.t-line .t-ok { color: #6bcf7f; }
.t-line .t-warm { color: var(--amber); }
.t-line .t-dim { color: var(--paper-dim); }
.t-caret {
  display: inline-block;
  width: 8px; height: 16px;
  margin-left: 2px;
  background: var(--jade);
  vertical-align: -2px;
  animation: caretBlink 1s steps(1) infinite;
}
@keyframes caretBlink { 50% { opacity: 0; } }

/* Hero 按钮 */
.hero__actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 13px 30px;
  font-size: 15px;
  letter-spacing: .12em;
  border-radius: 4px;
  transition: transform .25s ease, background .25s, border-color .25s, color .25s, box-shadow .25s;
}
.btn--primary {
  background: var(--jade);
  color: #06201c;
  font-weight: 500;
  box-shadow: 0 8px 30px rgba(99, 230, 210, .22);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(99, 230, 210, .35);
}
.btn--ghost {
  border: 1px solid var(--line-strong);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--jade); color: var(--jade); transform: translateY(-2px); }

/* 滚动提示 */
.hero__scroll {
  position: absolute;
  left: 50%; bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .25em;
  color: var(--paper-dim);
}
.hero__scroll-line {
  width: 1px; height: 42px;
  background: linear-gradient(var(--jade), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 通用 Section ---------- */
.section {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
  padding: 120px 32px;
}
.section__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 44px;
}
.section__index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--vermilion);
}
.section__label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--paper-dim);
}
.section__label::before {
  content: "— ";
  color: var(--paper-dim);
}
.section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  line-height: 1.35;
  letter-spacing: .04em;
  margin: 0 0 56px;
}

/* ---------- 01 栈主 ---------- */
.about {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 72px;
  align-items: start;
}
.about__prose p { margin: 0 0 22px; color: var(--paper-soft); font-size: 16px; }
.about__motto {
  font-family: var(--font-serif);
  color: var(--amber) !important;
  letter-spacing: .1em;
}
.about__meta {
  margin: 0;
  border-top: 1px solid var(--line);
}
.about__meta div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}
.about__meta dt { color: var(--paper-dim); font-size: 14px; }
.about__meta dd { margin: 0; font-size: 14.5px; color: var(--paper); text-align: right; }
.dot-live {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #6bcf7f;
  margin-right: 7px;
  box-shadow: 0 0 8px #6bcf7f;
  animation: livePulse 2s ease-in-out infinite;
}
@keyframes livePulse { 50% { opacity: .4; } }

/* ---------- 02 手艺 ---------- */
.skills { display: flex; flex-direction: column; }
.skill-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 30px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.skill-row:last-child { border-bottom: 1px solid var(--line); }
.skill-row__name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: .06em;
}
.skill-row__name small {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--paper-dim);
}
.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.tags li {
  padding: 6px 15px;
  font-size: 13.5px;
  color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: 3px;
  transition: border-color .25s, color .25s, background .25s;
}
.tags li:hover { border-color: var(--jade-dim); color: var(--jade); background: rgba(99,230,210,.05); }

/* ---------- 03 招牌 ---------- */
.projects { display: flex; flex-direction: column; }
.project {
  position: relative;
  display: grid;
  grid-template-columns: 80px 1fr 40px;
  gap: 24px;
  padding: 44px 12px;
  border-top: 1px solid var(--line);
  align-items: start;
  transition: background .3s, padding-left .3s;
}
.project:last-child { border-bottom: 1px solid var(--line); }
.project:hover { background: rgba(99, 230, 210, .03); padding-left: 24px; }
.project__no {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--paper-dim);
  transition: color .3s;
}
.project:hover .project__no { color: var(--jade); }
.project__body h3 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: .05em;
}
.project__body p { margin: 0 0 18px; color: var(--paper-soft); font-size: 15px; max-width: 640px; }
.project__stack { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.project__stack li {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--paper-dim);
}
.project__stack li:not(:last-child)::after { content: " ·"; }
.project__arrow {
  font-size: 1.5rem;
  color: var(--paper-dim);
  transition: transform .3s, color .3s;
  justify-self: end;
}
.project:hover .project__arrow { color: var(--jade); transform: translateX(6px); }

/* ---------- 04 手记 ---------- */
.notes { display: flex; flex-direction: column; }
.note {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 26px 12px;
  border-top: 1px solid var(--line);
  transition: padding-left .3s;
}
.note:last-child { border-bottom: 1px solid var(--line); }
.note:hover { padding-left: 24px; }
.note time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper-dim);
}
.note h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  transition: color .25s;
}
.note:hover h3 { color: var(--jade); }
.note__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--amber);
  border: 1px solid rgba(240, 178, 100, .3);
  padding: 3px 10px;
  border-radius: 3px;
}

/* ---------- 05 落脚 ---------- */
.section--contact { text-align: left; }
.contact__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.25;
  letter-spacing: .06em;
  margin: 0 0 24px;
}
.contact__sub { color: var(--paper-soft); margin: 0 0 50px; font-size: 16px; }
.contact__links { display: flex; flex-direction: column; gap: 2px; max-width: 520px; }
.contact__link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 22px 4px;
  border-top: 1px solid var(--line);
  transition: padding-left .3s;
}
.contact__link:last-child { border-bottom: 1px solid var(--line); }
.contact__link:hover { padding-left: 18px; }
.contact__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--paper-dim);
}
.contact__val {
  font-size: 16px;
  color: var(--paper);
  transition: color .25s;
}
.contact__link:hover .contact__val { color: var(--jade); }

/* ---------- 页脚 ---------- */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
}
.footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 32px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--paper-dim);
}
.footer__motto { font-family: var(--font-serif); letter-spacing: .15em; }
.footer__beian {
  margin-left: 16px;
  color: var(--paper-dim);
  transition: color .25s;
}
.footer__beian:hover { color: var(--jade); }

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal:nth-child(2) { transition-delay: .08s; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; gap: 44px; }
  .skill-row { grid-template-columns: 1fr; gap: 14px; }
  .note { grid-template-columns: 1fr; gap: 8px; align-items: start; }
}

@media (max-width: 640px) {
  .nav__inner { padding: 0 20px; }
  .nav__links { gap: 18px; }
  .nav__links a { font-size: 14px; }
  .nav__name { display: none; }
  .hero__inner, .section { padding-left: 20px; padding-right: 20px; }
  .section { padding-top: 84px; padding-bottom: 84px; }
  .project { grid-template-columns: 44px 1fr; gap: 14px; padding: 32px 4px; }
  .project__arrow { display: none; }
  .footer__inner { flex-direction: column; padding-left: 20px; padding-right: 20px; }
  .hero__scroll { display: none; }
}

/* ---------- 降级：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .t-caret, .hero__scroll-line, .dot-live { animation: none; }
}