/* ============================================================
   葫芦娃设计笔记 · Design System
   Aesthetic: 杂志编辑风 × 纸感工坊 (Editorial × Paper Atelier)
   Tokens → Base → Layout → Components → Motion
   ============================================================ */

/* ---------- 1. Design Tokens ---------- */
:root {
  /* Color */
  --paper:      #F2EFE6;
  --paper-2:    #E9E4D6;
  --paper-3:    #DDD6C4;
  --ink:        #1C1A16;
  --ink-soft:   #3D3830;
  --muted:      #8A8578;
  --line:       color-mix(in oklab, var(--ink) 16%, transparent);
  --line-strong:color-mix(in oklab, var(--ink) 34%, transparent);
  --accent:     #D6432B;
  --accent-deep:#B03420;
  --accent-soft:color-mix(in oklab, var(--accent) 12%, var(--paper));

  /* Type */
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-sans:  "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  --font-mono:  "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  /* Fluid scale */
  --fs-xs:   clamp(0.69rem, 0.66rem + 0.12vw, 0.75rem);
  --fs-sm:   clamp(0.81rem, 0.78rem + 0.15vw, 0.88rem);
  --fs-base: clamp(0.95rem, 0.91rem + 0.2vw, 1.05rem);
  --fs-lg:   clamp(1.15rem, 1.06rem + 0.45vw, 1.42rem);
  --fs-xl:   clamp(1.55rem, 1.32rem + 1.1vw, 2.35rem);
  --fs-2xl:  clamp(2.1rem, 1.65rem + 2.2vw, 3.6rem);
  --fs-hero: clamp(3.4rem, 2.1rem + 6.4vw, 8.6rem);

  /* Space */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;
  --sp-section: clamp(5rem, 3.5rem + 7vw, 9.5rem);

  /* Layout */
  --max-w: 1280px;
  --nav-h: 68px;

  /* Motion */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.7, 0, 0.84, 0);
  --t-fast:    160ms;
  --t-base:    300ms;
  --t-slow:    620ms;

  /* Grain data-uri */
  --grain-url: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ---------- 2. Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
em { font-style: normal; }
strong { font-weight: 600; }

::selection { background: var(--accent); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* 纸纹颗粒 */
.grain {
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  background-image: var(--grain-url);
  opacity: 0.055;
  pointer-events: none;
  z-index: 999;
  animation: grain-shift 9s steps(6) infinite;
}

@keyframes grain-shift {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-2%, 1%); }
  40% { transform: translate(1%, -2%); }
  60% { transform: translate(-1%, 2%); }
  80% { transform: translate(2%, 1%); }
}

/* ---------- 3. Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 120;
  background: transparent;
}
.scroll-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transform-origin: left;
}

/* ---------- 4. Navigation ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  background: color-mix(in oklab, var(--paper) 82%, transparent);
  backdrop-filter: blur(12px) saturate(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base) ease, background var(--t-base) ease;
}
.site-nav.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in oklab, var(--paper) 92%, transparent);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-mark {
  width: 28px; height: 28px;
  color: var(--ink);
  transition: color var(--t-fast) ease, transform var(--t-base) var(--ease-out);
}
.nav-logo:hover .logo-mark { color: var(--accent); transform: rotate(-8deg); }

.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  letter-spacing: 0.06em;
}
.nav-logo-text em {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  margin-left: 0.45rem;
  color: var(--muted);
  vertical-align: 0.18em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2.2vw, 2.1rem);
}
.nav-links a {
  position: relative;
  font-size: var(--fs-sm);
  letter-spacing: 0.12em;
  padding: 0.35em 0;
  color: var(--ink-soft);
  transition: color var(--t-fast) ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--t-base) var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after,
.nav-links a.is-active::after { transform: scaleX(1); transform-origin: left; }

.nav-cta {
  padding: 0.55em 1.15em !important;
  border: 1px solid var(--ink);
  border-radius: 999px;
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  background: var(--ink);
  color: var(--paper) !important;
}

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 10px;
  width: 20px; height: 1.5px;
  background: var(--ink);
  transition: transform var(--t-base) var(--ease-out), top var(--t-base) var(--ease-out);
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 23px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 19.5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { top: 19.5px; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 99;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.4rem;
  padding: 2rem clamp(1.25rem, 6vw, 3rem);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu a {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 8vw, 2.6rem);
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5em;
}
.mobile-menu a:hover { color: var(--accent); }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 0.82em 1.55em;
  font-size: var(--fs-sm);
  letter-spacing: 0.12em;
  border: 1px solid var(--ink);
  border-radius: 999px;
  transition: background var(--t-base) var(--ease-out),
              color var(--t-base) var(--ease-out),
              transform var(--t-fast) var(--ease-out),
              border-color var(--t-base) ease;
}
.btn .arr { transition: transform var(--t-base) var(--ease-out); }
.btn:hover .arr { transform: translate(2px, -2px); }

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
}
.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
}
.btn-lg {
  padding: 1.05em 2.1em;
  font-size: var(--fs-base);
}

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 3rem) clamp(1.25rem, 5vw, 4.5rem) 4rem;
  overflow: hidden;
}

.hero-deco { position: absolute; inset: 0; pointer-events: none; }

.hero-circle {
  position: absolute;
  top: 12%; right: -8%;
  width: clamp(280px, 42vw, 620px);
  aspect-ratio: 1;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}
.hero-circle::before {
  content: "";
  position: absolute;
  inset: 14%;
  border: 1px dashed color-mix(in oklab, var(--accent) 45%, transparent);
  border-radius: 50%;
}
.hero-circle::after {
  content: "";
  position: absolute;
  inset: 34%;
  background: var(--accent);
  opacity: 0.9;
  border-radius: 50%;
  animation: pulse-soft 7s ease-in-out infinite;
}

@keyframes pulse-soft {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(ellipse 70% 65% at 30% 45%, black 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 65% at 30% 45%, black 0%, transparent 78%);
  opacity: 0.55;
}

.hero-vertical {
  position: absolute;
  top: 22%;
  right: clamp(1rem, 3.2vw, 2.6rem);
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.38em;
  color: var(--muted);
}

.hero-inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.26em;
  color: var(--muted);
  margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
}
.hero-eyebrow .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.02em;
}

.hero-line {
  display: block;
  font-size: var(--fs-hero);
}
.hero-line .t-cn { margin-right: 0.12em; }
.t-outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  text-stroke: 1.5px var(--ink);
}

.hero-line-en {
  font-family: var(--font-mono);
  font-size: clamp(0.78rem, 0.72rem + 0.45vw, 1.15rem);
  font-weight: 400;
  letter-spacing: 0.52em;
  color: var(--ink-soft);
  margin-top: clamp(0.75rem, 2vw, 1.4rem);
  padding-left: 0.35em;
}

.hero-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2.25rem, 5.5vw, 4.25rem);
  max-width: 980px;
}

.hero-lede {
  font-size: var(--fs-lg);
  line-height: 2.05;
  color: var(--ink-soft);
  max-width: 34em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-meta {
  position: absolute;
  left: clamp(1.25rem, 5vw, 4.5rem);
  bottom: 2.1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.3em;
  color: var(--muted);
}
.hero-meta-line {
  width: 56px;
  height: 1px;
  background: var(--line-strong);
}

/* ---------- 7. Marquee ---------- */
.marquee {
  background: var(--accent);
  color: var(--paper);
  overflow: hidden;
  padding: 1.05rem 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  width: max-content;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.3em;
  white-space: nowrap;
  animation: marquee 36s linear infinite;
}
.marquee-track i {
  font-style: normal;
  opacity: 0.7;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.marquee:hover .marquee-track { animation-play-state: paused; }

/* ---------- 8. Sections ---------- */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--sp-section) clamp(1.25rem, 5vw, 4.5rem);
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 1.15rem;
  row-gap: 0.35rem;
  align-items: baseline;
  padding-bottom: 1.55rem;
  border-bottom: 1px solid var(--ink);
  margin-bottom: clamp(2.25rem, 5vw, 3.75rem);
}

.section-index {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.22em;
  color: var(--accent);
  align-self: center;
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--fs-2xl);
  line-height: 1.15;
  letter-spacing: 0.05em;
}

.section-en {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.32em;
  color: var(--muted);
}

.section-intro {
  max-width: 40em;
  font-size: var(--fs-lg);
  color: var(--ink-soft);
  margin: -1.25rem 0 clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1.95;
}

/* ---------- 9. About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.85fr) 1.35fr;
  gap: clamp(2rem, 5.5vw, 5rem);
  align-items: start;
}

.portrait-frame {
  border: 1px solid var(--ink);
  background: var(--paper-2);
}
.portrait-art {
  aspect-ratio: 320 / 380;
  overflow: hidden;
}
.portrait-svg {
  width: 100%; height: 100%;
}
.portrait-caption {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1.1rem;
  border-top: 1px solid var(--ink);
  font-size: var(--fs-xs);
  color: var(--muted);
  letter-spacing: 0.08em;
}
.caption-tag {
  font-family: var(--font-mono);
  letter-spacing: 0.22em;
  color: var(--accent);
}

.about-body p {
  margin-bottom: 1.35em;
  max-width: 42em;
  color: var(--ink-soft);
}
.about-lead {
  font-size: var(--fs-lg);
  line-height: 1.95;
  color: var(--ink) !important;
}
.about-lead strong {
  color: var(--accent);
  font-weight: 600;
}
.about-lead em {
  border-bottom: 1.5px solid color-mix(in oklab, var(--accent) 55%, transparent);
  padding-bottom: 0.08em;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(2rem, 4vw, 3rem);
}
.stat {
  background: var(--paper);
  padding: 1.35rem 1.15rem 1.25rem;
}
.stat dt {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 0.55rem;
}
.stat dd {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 1.45rem + 1.6vw, 2.85rem);
  line-height: 1;
  letter-spacing: 0.02em;
}
.stat-unit {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--muted);
  margin-left: 0.22em;
  letter-spacing: 0.12em;
}

/* ---------- 10. Notes ---------- */
.notes { position: relative; }

.notes-list {
  border-top: 1px solid var(--ink);
}
.note {
  display: grid;
  grid-template-columns: 4.5rem 1fr auto;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: baseline;
  padding: clamp(1.55rem, 3vw, 2.35rem) 0.25rem;
  border-bottom: 1px solid var(--line);
  transition: background var(--t-base) ease, padding-left var(--t-base) var(--ease-out);
}
.note:hover {
  background: var(--accent-soft);
  padding-left: 1.15rem;
}

.note-num {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.24em;
  color: var(--accent);
}

.note-body h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  line-height: 1.35;
  letter-spacing: 0.045em;
  margin-bottom: 0.55em;
}
.note-body p {
  max-width: 46em;
  color: var(--ink-soft);
  line-height: 1.95;
}

.note-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.24em;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.35em 0.95em;
  white-space: nowrap;
}

/* ---------- 11. Works ---------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.75rem, 4vw, 3.25rem) clamp(1.5rem, 3.2vw, 2.75rem);
}

/* 交错节奏：偶数项下沉，制造编辑错落 */
.work:nth-child(even) {
  margin-top: clamp(0rem, 3vw, 3.5rem);
}

.work {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border: 1px solid transparent;
  transition: border-color var(--t-base) ease;
}
.work:hover, .work:focus-visible {
  border-color: var(--line-strong);
}

.work-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--ink);
}
.work-visual svg {
  width: 100%; height: 100%;
  transition: transform var(--t-slow) var(--ease-out);
}
.work:hover .work-visual svg,
.work:focus-visible .work-visual svg {
  transform: scale(1.045);
}

.work-year {
  position: absolute;
  top: 0.85rem; right: 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 0.28em 0.75em;
}

.work-info {
  padding: 1.35rem 0.15rem 0.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.work-info h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  letter-spacing: 0.05em;
  margin-bottom: 0.35em;
}
.work-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 0.85em;
}
.work-desc {
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: 1.1em;
  flex: 1;
}
.work-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--accent);
  border-bottom: 1px solid color-mix(in oklab, var(--accent) 45%, transparent);
  align-self: flex-start;
  padding-bottom: 0.25em;
}
.work-link .arr { transition: transform var(--t-base) var(--ease-out); }
.work:hover .work-link .arr { transform: translateX(5px); }

/* ---------- 12. Toolbox ---------- */
.toolbox-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--ink);
}

.tool-block {
  background: var(--paper);
  padding: clamp(1.65rem, 3.4vw, 2.65rem);
}
.tool-title {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  letter-spacing: 0.06em;
  margin-bottom: 1.55rem;
}
.tool-mark {
  display: inline-grid;
  place-items: center;
  width: 2.15rem; height: 2.15rem;
  border: 1px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0;
  color: var(--accent);
}

/* 字体样张 */
.type-specimen {
  display: flex;
  flex-direction: column;
}
.specimen-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}
.specimen-row:last-child { border-bottom: 0; }
.specimen-sample { line-height: 1.25; }
.specimen-serif { font-family: var(--font-serif); font-size: clamp(1.55rem, 1.25rem + 1.1vw, 2.25rem); letter-spacing: 0.1em; }
.specimen-sans  { font-family: var(--font-sans); font-size: clamp(1.15rem, 1rem + 0.5vw, 1.55rem); letter-spacing: 0.08em; }
.specimen-mono  { font-family: var(--font-mono); font-size: clamp(1rem, 0.92rem + 0.35vw, 1.3rem); letter-spacing: 0.14em; color: var(--accent); }
.specimen-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* 色彩 */
.color-chips {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.color-chips li {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}
.color-chips em {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  letter-spacing: 0.18em;
  color: var(--ink);
  min-width: 1.6em;
}
.chip {
  width: 2.35rem; height: 2.35rem;
  border: 1px solid var(--ink);
  flex-shrink: 0;
}
.chip-line { box-shadow: inset 0 0 0 3px var(--paper); }
.tool-note {
  margin-top: 1.45rem;
  padding-top: 1.15rem;
  border-top: 1px dashed var(--line-strong);
  font-size: var(--fs-sm);
  color: var(--muted);
  line-height: 1.9;
}

/* 装备 */
.gear-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  letter-spacing: 0.12em;
}
.gear-list li:first-child { padding-top: 0; }
.gear-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.gear-list span:first-child { font-weight: 500; }
.gear-desc {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* 方法 */
.method-list {
  counter-reset: step;
  display: flex;
  flex-direction: column;
}
.method-list li {
  counter-increment: step;
  position: relative;
  padding: 0.95rem 0 0.95rem 2.65rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}
.method-list li:last-child { border-bottom: 0; }
.method-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 1.05rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--accent);
}
.method-list strong {
  color: var(--ink);
  margin-right: 0.2em;
}

/* ---------- 13. Quote ---------- */
.quote {
  padding: clamp(3.5rem, 8vw, 7rem) clamp(1.25rem, 5vw, 4.5rem);
  background: var(--ink);
  color: var(--paper);
}
.quote blockquote {
  max-width: var(--max-w);
  margin: 0 auto;
}
.quote p {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 1.25rem + 3vw, 3.85rem);
  line-height: 1.55;
  letter-spacing: 0.08em;
}
.quote p em {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}
.quote footer {
  margin-top: 2.15rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.26em;
  color: color-mix(in oklab, var(--paper) 55%, transparent);
}

/* ---------- 14. Contact ---------- */
.contact { padding-bottom: clamp(4rem, 8vw, 7rem); }

.contact-panel {
  border: 1px solid var(--ink);
  padding: clamp(2.25rem, 6vw, 5.25rem) clamp(1.5rem, 5vw, 4.5rem);
  background:
    linear-gradient(135deg, var(--accent-soft) 0%, transparent 55%),
    var(--paper-2);
}

.contact-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.32em;
  color: var(--accent);
  margin-bottom: 1.35rem;
}

.contact-title {
  font-family: var(--font-serif);
  font-size: clamp(2.15rem, 1.55rem + 3vw, 4.25rem);
  line-height: 1.25;
  letter-spacing: 0.06em;
  margin-bottom: 1.35rem;
}

.contact-lede {
  max-width: 38em;
  font-size: var(--fs-lg);
  line-height: 1.95;
  color: var(--ink-soft);
  margin-bottom: 2.45rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.35rem 1.85rem;
}
.contact-links a {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 0.25em;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}
.contact-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- 15. Footer ---------- */
.site-footer {
  border-top: 1px solid var(--ink);
  padding: 2.65rem clamp(1.25rem, 5vw, 4.5rem) 2.15rem;
  background: var(--paper);
}
.footer-top {
  max-width: var(--max-w);
  margin: 0 auto 1.85rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  letter-spacing: 0.08em;
}
.footer-logo em {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-left: 0.55em;
}
.footer-nav {
  display: flex;
  gap: 1.65rem;
}
.footer-nav a {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--muted);
  transition: color var(--t-fast) ease;
}
.footer-nav a:hover { color: var(--accent); }

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  padding-top: 1.45rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--muted);
}
.footer-mono { letter-spacing: 0.26em; }

/* ---------- 16. Reveal Motion ---------- */
/* 渐进增强：仅在 JS 可用时才隐藏待显现元素 */
.reveal {
  transition:
    opacity 0.85s var(--ease-out),
    transform 0.85s var(--ease-out);
  transition-delay: var(--d, 0s);
}
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
}
.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 17. Responsive ---------- */
@media (max-width: 960px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.35rem;
  }
  .about-portrait {
    max-width: 380px;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .toolbox-grid {
    grid-template-columns: 1fr;
  }
  .note {
    grid-template-columns: 3.25rem 1fr;
  }
  .note-tag {
    grid-column: 2;
    justify-self: start;
    margin-top: 0.45rem;
  }
}

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .hero {
    padding-top: calc(var(--nav-h) + 2.25rem);
    min-height: auto;
    padding-bottom: 4.5rem;
  }
  .hero-vertical { display: none; }
  .hero-meta {
    position: static;
    margin-top: 2.75rem;
    padding: 0;
  }
  .hero-foot {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-lede br { display: none; }

  .works-grid {
    grid-template-columns: 1fr;
  }
  .work:nth-child(even) {
    margin-top: 0;
  }

  .section-head {
    grid-template-columns: auto 1fr;
    column-gap: 0.85rem;
  }

  .contact-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 420px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .note { grid-template-columns: 2.5rem 1fr; gap: 0.85rem; }
  .btn { padding: 0.75em 1.25em; }
}

/* ---------- 18. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  .js .reveal, .reveal {
    opacity: 1;
    transform: none;
  }
  .grain { display: none; }
}

/* ---------- 19. Print ---------- */
@media print {
  .grain, .scroll-progress, .site-nav, .mobile-menu, .marquee, .work-modal { display: none !important; }
  body { background: #fff; color: #000; }
  .js .reveal, .reveal { opacity: 1; transform: none; }
}

/* ---------- 20. Work Modal ---------- */
.work-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: clamp(1rem, 4vw, 2.5rem);
}
.work-modal[hidden] { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in oklab, var(--ink) 55%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: modal-fade var(--t-base) var(--ease-out);
}

.modal-panel {
  position: relative;
  width: min(720px, 100%);
  max-height: min(86dvh, 880px);
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 0 28px 68px rgba(28, 26, 22, 0.25);
  animation: modal-in 0.45s var(--ease-out);
}

@keyframes modal-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
/* 面板只做位移，避免淡入期间透出底层内容 */
@keyframes modal-in {
  from { transform: translateY(22px); }
  to   { transform: none; }
}

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
  padding: clamp(1.35rem, 3.2vw, 2.15rem);
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--ink);
}

.modal-fig {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-bottom: 0.55rem;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  line-height: 1.3;
  letter-spacing: 0.05em;
}

.modal-meta {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--muted);
}

.modal-close {
  flex-shrink: 0;
  width: 42px; height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  transition: background var(--t-fast) ease,
              color var(--t-fast) ease,
              transform var(--t-base) var(--ease-out);
}
.modal-close svg { width: 18px; height: 18px; }
.modal-close:hover {
  background: var(--ink);
  color: var(--paper);
  transform: rotate(90deg);
}

.modal-body {
  padding: clamp(1.35rem, 3.2vw, 2.15rem);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.modal-block {
  display: grid;
  grid-template-columns: 3.15rem 1fr;
  gap: 1.15rem;
  align-items: baseline;
}
.modal-block-num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--accent);
}
.modal-block-label {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  letter-spacing: 0.14em;
  margin-bottom: 0.5em;
}
.modal-block-label small {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-left: 0.75em;
}
.modal-block p {
  color: var(--ink-soft);
  line-height: 2.05;
  max-width: 40em;
}

.modal-foot {
  padding: 1rem clamp(1.35rem, 3.2vw, 2.15rem) 1.25rem;
  border-top: 1px dashed var(--line-strong);
}
.modal-foot-note {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.28em;
  color: var(--muted);
}

body.modal-open { overflow: hidden; }

/* ---------- 21. Footer ICP ---------- */
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.65rem;
}
.footer-icp {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}
.footer-icp:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* 卡片键盘焦点 */
.work:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (max-width: 560px) {
  .modal-block {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .modal-panel {
    max-height: 90dvh;
  }
}