/* ============================================================
   屿 · LAIR — 海图志 / Nautical Atlas
   暖纸底、墨蓝字、朱红印。与旧版完全不同的印刷编辑风。
   ============================================================ */

:root {
  --paper: #EFE8D8;
  --paper-2: #F7F3E8;
  --paper-3: #E7DEC9;
  --ink: #16273A;
  --ink-2: #435565;
  --ink-3: #7A8792;
  --red: #B23A2A;
  --teal: #2E5F6F;
  --line: rgba(22, 39, 58, 0.16);
  --line-soft: rgba(22, 39, 58, 0.08);
  --line-strong: rgba(22, 39, 58, 0.34);
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, "Cascadia Mono", "Roboto Mono", monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 海图网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(22, 39, 58, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 39, 58, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
}

/* 纸张颗粒 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.06'/%3E%3C/svg%3E");
}

main, footer, .topbar { position: relative; z-index: 2; }

::selection { background: var(--red); color: var(--paper-2); }

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ol, ul, dl, dd { margin: 0; padding: 0; list-style: none; }

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

.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 48px);
}

/* ============ 顶部导航 ============ */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 70;
  height: 2px;
  width: 0;
  background: var(--red);
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  height: 68px;
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 44px);
  padding: 0 clamp(18px, 4vw, 44px);
  border-bottom: 1px solid transparent;
  transition: background-color .4s ease, border-color .4s ease;
}

.topbar.scrolled {
  background: rgba(239, 232, 216, 0.86);
  border-bottom-color: var(--line);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  backdrop-filter: blur(14px) saturate(1.1);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-right: auto;
}

.brand-mark {
  width: 32px;
  height: 32px;
  color: var(--ink);
  flex: none;
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 7px;
  line-height: 1;
}

.brand-text b {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: .06em;
}

.brand-text em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 9.5px;
  letter-spacing: .3em;
  color: var(--ink-3);
}

.topnav {
  display: flex;
  gap: clamp(16px, 2.2vw, 30px);
}

.topnav a {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--ink-2);
  transition: color .3s ease;
  white-space: nowrap;
}

.topnav a i {
  font-style: normal;
  color: var(--red);
  margin-right: 5px;
  opacity: .8;
}

.topnav a:hover { color: var(--red); }

.topbar-tag {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  color: var(--ink-2);
  border: 1px solid var(--line-strong);
  padding: 5px 10px 4px;
  white-space: nowrap;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border: 1px solid var(--ink);
  font-size: 12px;
  letter-spacing: .16em;
  line-height: 1;
  transition: background-color .35s ease, color .35s ease, border-color .35s ease, transform .35s ease;
}

.btn::after {
  content: "→";
  font-family: var(--mono);
  font-size: 12px;
  transition: transform .35s ease;
}

.btn:hover::after { transform: translateX(4px); }

.btn-solid {
  background: var(--ink);
  color: var(--paper-2);
}

.btn-solid:hover {
  background: var(--red);
  border-color: var(--red);
  transform: translateY(-2px);
}

.btn-line {
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn-line:hover {
  color: var(--red);
  border-color: var(--red);
  transform: translateY(-2px);
}

/* ============ 00 封面 ============ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: clamp(108px, 16vh, 150px) 0 clamp(88px, 12vh, 120px);
}

.hero-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  grid-template-areas:
    "head chart"
    "body chart";
  align-items: center;
  column-gap: clamp(40px, 6vw, 90px);
  row-gap: 0;
}

.hero-head { grid-area: head; }
.hero-body { grid-area: body; }

.chart-plate {
  grid-area: chart;
  align-self: center;
  justify-self: end;
  margin: 0;
  width: min(100%, 440px);
}

.eyebrow {
  margin: 0 0 clamp(24px, 4vh, 38px);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .28em;
  color: var(--ink-3);
}

.hero-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(42px, 6.2vw, 78px);
  line-height: 1.16;
  letter-spacing: .05em;
  color: var(--ink);
  text-wrap: balance;
}

.hero-title-sub {
  display: block;
  margin-top: .46em;
  font-size: .44em;
  letter-spacing: .1em;
  line-height: 1.7;
  color: var(--ink-2);
}

.hero-lead {
  margin: clamp(26px, 4vh, 40px) 0 0;
  max-width: 27em;
  font-size: clamp(13.5px, 1.1vw, 15.5px);
  line-height: 2.1;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 4vh, 40px);
}

.hero-coord {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: clamp(34px, 5vh, 52px) 0 0;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .1em;
  color: var(--ink-3);
}

.hero-coord .sep { color: var(--red); opacity: .6; }

/* 海图 */
.plate-inner {
  border: 1px solid var(--line-strong);
  padding: clamp(8px, 1.4vw, 16px);
  background: rgba(247, 243, 232, 0.45);
}

.nautical {
  width: 100%;
  height: auto;
}

.route path {
  animation: routeFlow 7s linear infinite;
}

@keyframes routeFlow {
  to { stroke-dashoffset: -28; }
}

.plate-cap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .1em;
  color: var(--ink-3);
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .3em;
  color: var(--ink-3);
}

.scroll-cue i {
  position: relative;
  width: 1px;
  height: 38px;
  background: var(--line-strong);
  overflow: hidden;
}

.scroll-cue i::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 12px;
  background: var(--red);
  animation: cue 2.8s ease-in-out infinite;
}

@keyframes cue {
  0% { transform: translateY(-14px); opacity: 0; }
  35% { opacity: 1; }
  100% { transform: translateY(40px); opacity: 0; }
}

/* ============ 章节通用 ============ */
.section {
  padding: clamp(76px, 11vh, 126px) 0;
  scroll-margin-top: 68px;
}

.chap {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: clamp(18px, 3vw, 38px);
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(18px, 3vw, 30px);
}

.chap-num {
  font-family: var(--serif);
  font-size: clamp(44px, 6vw, 78px);
  line-height: .78;
  color: transparent;
  -webkit-text-stroke: 1px rgba(22, 39, 58, 0.34);
  letter-spacing: 0;
  margin-top: 4px;
}

.chap-kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .28em;
  color: var(--ink-3);
}

.chap-title {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(30px, 4.4vw, 54px);
  line-height: 1.32;
  letter-spacing: .04em;
  color: var(--ink);
}

.section-lead {
  max-width: 43em;
  margin: clamp(26px, 4vw, 40px) 0 0;
  font-size: 14.5px;
  line-height: 2.1;
  color: var(--ink-2);
}

.section-lead.narrow { max-width: 34em; }

/* ============ 01 关于 ============ */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(36px, 7vw, 90px);
  margin-top: clamp(38px, 5vw, 56px);
}

.about-quote p {
  margin: 0;
  padding-left: clamp(18px, 2.4vw, 26px);
  border-left: 2px solid var(--red);
  font-family: var(--serif);
  font-size: clamp(18px, 1.9vw, 24px);
  line-height: 2;
  letter-spacing: .02em;
  color: var(--ink);
  text-wrap: pretty;
}

.about-body p {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 2.1;
  color: var(--ink-2);
}

.about-body p:last-child { margin-bottom: 0; }
.about-body .muted { color: var(--ink-3); font-size: 13.5px; }

.ledger {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(48px, 7vw, 76px);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.ledger > div {
  padding: 24px clamp(12px, 2vw, 24px) 26px;
  border-left: 1px solid var(--line);
}

.ledger > div:first-child {
  border-left: 0;
  padding-left: 0;
}

.ledger dt {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .2em;
  color: var(--ink-3);
}

.ledger dd { margin-top: 12px; }

.ledger b {
  display: block;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(30px, 3.4vw, 42px);
  line-height: 1.1;
  color: var(--red);
}

.ledger dd span {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* ============ 02 潮汐表 ============ */
.moods {
  background: rgba(247, 243, 232, 0.72);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.tide-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(34px, 5vw, 50px);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.tide {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  padding: 20px clamp(12px, 1.6vw, 22px) 22px;
  border-left: 1px solid var(--line);
  text-align: left;
  transition: background-color .4s ease, color .4s ease;
}

.tide:first-child { border-left: 0; }

.tide:hover { background: rgba(22, 39, 58, 0.045); }

.tide.is-active {
  background: var(--ink);
  color: var(--paper-2);
}

.tide-strip {
  display: block;
  width: 30px;
  height: 5px;
  margin-bottom: 14px;
  background: var(--swatch);
  transition: width .4s ease;
}

.tide:hover .tide-strip,
.tide.is-active .tide-strip { width: 46px; }

.tide b {
  font-family: var(--serif);
  font-size: clamp(19px, 1.8vw, 23px);
  font-weight: 400;
  letter-spacing: .12em;
  line-height: 1.3;
}

.tide-en {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .2em;
  color: var(--ink-3);
  transition: color .4s ease;
}

.tide.is-active .tide-en { color: rgba(247, 243, 232, 0.6); }

.tide small {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-2);
  transition: color .4s ease;
}

.tide.is-active small { color: rgba(247, 243, 232, 0.75); }

/* 心情变量 */
[data-mood="quiet"] {
  --m-bg: #0B1120;
  --m-deep: #060910;
  --m-text: #E9EFF9;
  --m-text2: #93A0B8;
  --m-accent: #9CB6DE;
  --m-line: rgba(255, 255, 255, 0.14);
  --m-soft: rgba(255, 255, 255, 0.05);
  --m-frame: #283b52;
}

[data-mood="chat"] {
  --m-bg: #FAF4E9;
  --m-deep: #EFE3D0;
  --m-text: #2B241C;
  --m-text2: #857866;
  --m-accent: #B96A3F;
  --m-line: rgba(43, 36, 28, 0.16);
  --m-soft: rgba(43, 36, 28, 0.05);
  --m-frame: #D8C4A8;
}

[data-mood="meet"] {
  --m-bg: #1C0F0A;
  --m-deep: #0B0503;
  --m-text: #F8E9E0;
  --m-text2: #C79C86;
  --m-accent: #FF6B2C;
  --m-line: rgba(255, 138, 82, 0.22);
  --m-soft: rgba(255, 185, 143, 0.06);
  --m-frame: #4C2B1B;
}

[data-mood="express"] {
  --m-bg: #170D2E;
  --m-deep: #0A0519;
  --m-text: #F1EAFF;
  --m-text2: #B0A2D2;
  --m-accent: #C2A3FF;
  --m-line: rgba(255, 255, 255, 0.16);
  --m-soft: rgba(255, 255, 255, 0.06);
  --m-frame: #37265F;
}

.mood-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  align-items: center;
  gap: clamp(32px, 6vw, 74px);
  margin-top: clamp(40px, 6vw, 62px);
}

.mood-window {
  border: 1px solid var(--line-strong);
  padding: 12px;
  background: rgba(247, 243, 232, 0.6);
}

.win-bar,
.win-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .16em;
  color: var(--ink-3);
}

.win-bar { padding: 0 2px 10px; }
.win-foot { padding: 10px 2px 0; }

.win-body {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(26px, 4vw, 48px) clamp(18px, 3vw, 40px);
  background-color: var(--m-deep);
  background-image:
    linear-gradient(var(--m-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--m-line) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center;
  transition: background-color .7s ease;
  overflow: hidden;
}

.cross {
  position: absolute;
  width: 11px;
  height: 11px;
  opacity: .45;
  transition: border-color .7s ease;
}

.cross.tl { top: 12px; left: 12px; border-top: 1px solid var(--m-text2); border-left: 1px solid var(--m-text2); }
.cross.tr { top: 12px; right: 12px; border-top: 1px solid var(--m-text2); border-right: 1px solid var(--m-text2); }
.cross.bl { bottom: 12px; left: 12px; border-bottom: 1px solid var(--m-text2); border-left: 1px solid var(--m-text2); }
.cross.br { bottom: 12px; right: 12px; border-bottom: 1px solid var(--m-text2); border-right: 1px solid var(--m-text2); }

/* 手机 */
.phone {
  width: var(--phone-w, 212px);
  aspect-ratio: 9 / 18.4;
  border: 6px solid var(--p-frame, #20293B);
  border-radius: 26px;
  background: var(--p-bg, #0B1120);
  color: var(--p-text, #E9EFF9);
  overflow: hidden;
  box-shadow: 0 26px 50px -24px rgba(6, 9, 16, 0.65);
  flex: none;
  transition: background-color .7s ease, color .7s ease, border-color .7s ease;
}

.mood-window .phone {
  --phone-w: clamp(166px, 16.5vw, 206px);
  --p-bg: var(--m-bg);
  --p-frame: var(--m-frame);
  --p-text: var(--m-text);
  --p-text2: var(--m-text2);
  --p-accent: var(--m-accent);
  --p-line: var(--m-line);
  --p-soft: var(--m-soft);
}

.phone-dark {
  --phone-w: 246px;
  --p-bg: #0B1120;
  --p-frame: #20293B;
  --p-text: #E9EFF9;
  --p-text2: #93A0B8;
  --p-accent: #9CB6DE;
  --p-line: rgba(255, 255, 255, 0.12);
  --p-soft: rgba(255, 255, 255, 0.05);
}

.phone-express {
  --phone-w: 246px;
  --p-bg: #170D2E;
  --p-frame: #33255C;
  --p-text: #F1EAFF;
  --p-text2: #B0A2D2;
  --p-accent: #C2A3FF;
  --p-line: rgba(255, 255, 255, 0.15);
  --p-soft: rgba(255, 255, 255, 0.05);
}

.phone-screen {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 13px 13px 0;
  background: var(--p-bg);
  transition: background-color .7s ease;
}

.p-status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .06em;
  opacity: .65;
}

.p-bars { display: flex; gap: 3px; align-items: center; }
.p-bars i {
  display: block;
  width: 3px;
  height: 6px;
  background: currentColor;
  opacity: .8;
}
.p-bars i:nth-child(2) { height: 9px; opacity: .6; }
.p-bars i:nth-child(3) { height: 12px; opacity: .4; }

.p-head { margin-top: 14px; }

.p-head-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.p-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .22em;
  opacity: .55;
}

.p-head h4 {
  margin: 5px 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: .06em;
}

.p-avatar {
  width: 30px;
  height: 30px;
  border: 1px solid var(--p-line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 11px;
  color: var(--p-accent);
}

.p-island {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 0;
}

.p-island svg {
  width: 80%;
  height: auto;
  color: var(--p-accent);
}

.p-island.small svg { width: 74%; }

.p-quote {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 11.5px;
  line-height: 1.8;
  letter-spacing: .04em;
  text-align: center;
  color: var(--p-text2);
}

.p-sign {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-size: 11px;
  line-height: 1.8;
  text-align: center;
  color: var(--p-text2);
}

.p-mood {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 8px 0 0;
  font-size: 9px;
  letter-spacing: .06em;
  color: var(--p-text2);
}

.p-mood i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--p-accent);
}

.p-stats {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--p-line);
  font-size: 9px;
  color: var(--p-text2);
}

.p-stats b {
  display: block;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 16px;
  color: var(--p-accent);
  line-height: 1.2;
}

.p-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 10px;
}

.p-btns span {
  border: 1px solid var(--p-line);
  padding: 6px 0;
  text-align: center;
  font-size: 9px;
  letter-spacing: .04em;
  color: var(--p-accent);
}

.p-tabs {
  display: flex;
  margin-top: 12px;
  font-size: 9.5px;
  letter-spacing: .06em;
}

.p-tabs span {
  flex: 1;
  padding-bottom: 6px;
  text-align: center;
  color: var(--p-text2);
  border-bottom: 1px solid var(--p-line);
}

.p-tabs .on {
  color: var(--p-accent);
  border-bottom-color: var(--p-accent);
}

.p-post {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--p-line);
  background: var(--p-soft);
}

.p-post.flat { margin-top: 7px; }

.p-post-head {
  display: flex;
  gap: 7px;
  align-items: center;
}

.p-mini-avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--p-soft);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-style: normal;
  font-size: 8px;
  color: var(--p-accent);
  flex: none;
}

.p-post-head b {
  display: block;
  font-weight: 400;
  font-size: 9.5px;
  line-height: 1.3;
}

.p-post-head em {
  display: block;
  font-style: normal;
  font-size: 7.5px;
  color: var(--p-text2);
}

.p-post > p {
  margin: 8px 0 0;
  font-size: 10px;
  line-height: 1.7;
  color: var(--p-text);
}

.p-photo {
  margin-top: 8px;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(80% 90% at 30% 20%, rgba(194, 163, 255, .28), transparent 60%),
    linear-gradient(150deg, rgba(255, 255, 255, .12), rgba(255, 255, 255, .02));
  border: 1px solid var(--p-line);
}

.p-photo span {
  display: block;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(40% 70% at 68% 76%, rgba(255, 255, 255, .16), transparent 70%);
}

.p-acts {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: .04em;
  color: var(--p-text2);
}

.p-nav {
  display: flex;
  justify-content: space-around;
  margin-top: auto;
  padding: 11px 0 13px;
  border-top: 1px solid var(--p-line);
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: .12em;
  transition: border-color .7s ease;
}

.p-nav span {
  opacity: .4;
  color: var(--p-text2);
  transition: color .7s ease, opacity .7s ease;
}

.p-nav .on {
  opacity: 1;
  color: var(--p-accent);
}

/* 潮汐文字面板 */
.mood-panel { min-width: 0; }

.panel-kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .24em;
  color: var(--ink-3);
}

.mood-name {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(34px, 4.6vw, 52px);
  line-height: 1.15;
  letter-spacing: .14em;
  color: var(--ink);
}

.mood-quote {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.9;
  color: var(--ink-2);
  min-height: 2em;
}

.mood-meta {
  margin-top: clamp(24px, 4vw, 36px);
  border-top: 1px solid var(--line-strong);
}

.mood-meta > div {
  display: grid;
  grid-template-columns: 6.5em minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.mood-meta dt {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .16em;
  color: var(--ink-3);
  padding-top: 2px;
}

.mood-meta dd {
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.panel-note {
  margin: 18px 0 0;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .14em;
  color: var(--ink-3);
}

/* 文案切换淡出 */
.is-swapping .mood-name,
.is-swapping .mood-quote,
.is-swapping .mood-meta dd,
.is-swapping .p-quote,
.is-swapping .p-head h4 {
  opacity: 0;
  transform: translateY(5px);
}

.mood-name,
.mood-quote,
.mood-meta dd,
.p-quote,
.p-head h4 {
  transition: opacity .22s ease, transform .22s ease;
}

/* ============ 03 海域 ============ */
.route-map {
  margin: clamp(34px, 5vw, 52px) 0 clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

.route-map svg {
  width: 100%;
  height: auto;
}

.sea-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.sea-card {
  position: relative;
  padding: 24px clamp(12px, 1.5vw, 22px) 26px;
  border-left: 1px solid var(--line);
  transition: background-color .4s ease, transform .4s ease;
}

.sea-card:first-child { border-left: 0; }

.sea-card:hover { background: rgba(247, 243, 232, 0.8); }

.sea-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.sea-no {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--red);
}

.sea-en {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .14em;
  color: var(--ink-3);
}

.sea-card h3 {
  margin: 20px 0 12px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(26px, 2.6vw, 34px);
  line-height: 1.2;
  letter-spacing: .1em;
}

.sea-card p {
  margin: 0;
  font-size: 12px;
  line-height: 1.95;
  color: var(--ink-2);
}

.sea-tag {
  display: block;
  margin-top: 20px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .12em;
  color: var(--ink-3);
}

/* ============ 04 界面 ============ */
.plates {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(30px, 6vw, 80px);
  margin-top: clamp(38px, 6vw, 60px);
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.plate {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.fig-b { margin-top: clamp(0px, 4vw, 54px); }

.plate-tag {
  width: min(100%, 276px);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .16em;
  color: var(--ink-3);
}

.plate .phone {
  width: min(276px, 100%);
}

.plate figcaption {
  width: min(100%, 276px);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-top: 18px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: .08em;
  color: var(--ink);
}

.plate figcaption span {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .16em;
  color: var(--ink-3);
}

/* ============ 05 契约 ============ */
.promise { padding-bottom: clamp(80px, 12vh, 130px); }

.ticket {
  display: grid;
  grid-template-columns: 138px minmax(0, 1fr);
  margin-top: clamp(38px, 6vw, 58px);
  border: 1px solid var(--ink);
  background: rgba(247, 243, 232, 0.9);
  box-shadow: 14px 14px 0 rgba(22, 39, 58, 0.07);
}

.ticket-stub {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 26px 16px;
  border-right: 1px dashed var(--line-strong);
  text-align: center;
}

.stub-top {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .28em;
  color: var(--red);
}

.stub-big {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: 25px;
  letter-spacing: .3em;
  color: var(--ink);
}

.stub-line {
  width: 34px;
  height: 1px;
  background: var(--line-strong);
}

.stub-small {
  font-size: 10px;
  line-height: 1.9;
  color: var(--ink-2);
}

.stub-no {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .16em;
  color: var(--ink-3);
}

.ticket-main { padding: clamp(24px, 3.6vw, 40px); min-width: 0; }

.ticket-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-strong);
}

.ticket-head p {
  margin: 0;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .22em;
  color: var(--ink-3);
}

.ticket-head h3 {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(21px, 2.4vw, 28px);
  line-height: 1.4;
  letter-spacing: .04em;
}

.ticket-meta {
  text-align: right;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .1em;
  line-height: 2.1;
  color: var(--ink-3);
  white-space: nowrap;
}

.ticket-meta span { display: block; }

.clauses {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px clamp(24px, 3.4vw, 46px);
  padding: 26px 0;
  border-bottom: 1px dashed var(--line-strong);
}

.clauses li { min-width: 0; }

.cl-no {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  color: var(--red);
}

.clauses h4 {
  margin: 7px 0 8px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 16.5px;
  line-height: 1.5;
  letter-spacing: .04em;
}

.clauses p {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.95;
  color: var(--ink-2);
}

.ticket-foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 26px;
  padding-top: 24px;
}

.ticket-foot blockquote {
  margin: 0;
  min-width: 0;
}

.ticket-foot blockquote p {
  margin: 0;
  font-size: 12px;
  line-height: 1.95;
  color: var(--ink-2);
}

.ticket-foot .sign {
  margin-top: 10px;
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.5;
  letter-spacing: .08em;
  color: var(--ink);
}

.seal {
  flex: none;
  width: 96px;
  height: 96px;
  border: 2px solid var(--red);
  outline: 1px solid var(--red);
  outline-offset: 4px;
  border-radius: 50%;
  color: var(--red);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  transform: rotate(-9deg);
  opacity: .82;
}

.seal span {
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1;
  letter-spacing: .1em;
}

.seal small {
  font-family: var(--mono);
  font-size: 6.5px;
  letter-spacing: .12em;
}

/* ============ 尾声 ============ */
.ending {
  padding: clamp(86px, 13vh, 148px) 0 clamp(100px, 15vh, 170px);
  border-top: 1px solid var(--line-strong);
}

.ending .wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.end-kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .28em;
  color: var(--ink-3);
}

.end-title {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(38px, 6.4vw, 82px);
  line-height: 1.32;
  letter-spacing: .06em;
  color: var(--ink);
}

.end-sub {
  max-width: 32em;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  font-size: 13px;
  line-height: 2.1;
  color: var(--ink-2);
}

.end-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 38px);
}

/* ============ 页脚 ============ */
.footer {
  border-top: 2px solid var(--ink);
  background: rgba(247, 243, 232, 0.72);
  padding: clamp(38px, 5vw, 60px) 0 clamp(28px, 4vw, 42px);
}

.footer-word {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(56px, 14vw, 168px);
  line-height: .8;
  letter-spacing: .08em;
  text-align: center;
  color: transparent;
  -webkit-text-stroke: 1px rgba(22, 39, 58, 0.3);
  user-select: none;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
  border-top: 1px solid var(--line-strong);
  padding-top: 24px;
}

.f-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: .1em;
}

.f-tag {
  margin: 7px 0 0;
  font-size: 11.5px;
  color: var(--ink-2);
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 18px;
  align-content: start;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .08em;
  color: var(--ink-2);
  transition: color .3s ease;
}

.footer-links a:hover { color: var(--red); }

.footer-note {
  text-align: right;
  font-family: var(--mono);
  font-size: 8.5px;
  line-height: 2;
  letter-spacing: .04em;
  color: var(--ink-3);
}

.footer-note p { margin: 0; }
.footer-note a { border-bottom: 1px solid var(--line); }
.footer-note a:hover { color: var(--red); }

.f-coord { margin-top: 10px !important; letter-spacing: .18em; }

/* ============ 滚动出现 ============ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .8s cubic-bezier(.2, .7, .2, 1);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .topnav { gap: 16px; }
  .topnav a i { display: none; }
  .topbar-tag { display: none; }
  .hero-wrap { column-gap: 44px; }
  .sea-card p { font-size: 11.5px; }
}

@media (max-width: 900px) {
  .topnav { display: none; }
  .hero { min-height: auto; padding-top: 110px; }
  .hero-wrap {
    grid-template-columns: 1fr;
    grid-template-areas:
      "head"
      "chart"
      "body";
    row-gap: clamp(28px, 6vw, 38px);
    column-gap: 0;
  }
  .chart-plate {
    justify-self: center;
    width: min(78vw, 340px);
  }
  .hero-title { font-size: clamp(38px, 8vw, 60px); }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .mood-stage { grid-template-columns: 1fr; gap: 34px; }
  .mood-window { max-width: 560px; }
  .sea-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sea-card:nth-child(2n + 1) { border-left: 0; }
  .sea-card:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .sea-card:last-child { grid-column: 1 / -1; }
  .ticket { grid-template-columns: 1fr; }
  .ticket-stub {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    border-right: 0;
    border-bottom: 1px dashed var(--line-strong);
    padding: 18px 20px;
    gap: 10px 18px;
  }
  .stub-big { writing-mode: horizontal-tb; flex: none; font-size: 20px; }
  .stub-line { display: none; }
  .stub-no { margin-left: auto; }
  .plates { gap: 28px; }
  .plate .phone { width: min(240px, 100%); }
  .plate-tag, .plate figcaption { width: min(240px, 100%); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-note { grid-column: 1 / -1; text-align: left; }
}

@media (max-width: 700px) {
  body { font-size: 15px; }
  .hero { padding-bottom: 78px; }
  .hero-coord { font-size: 9px; gap: 8px; }
  .scroll-cue { display: none; }
  .ledger { grid-template-columns: 1fr; }
  .ledger > div { border-left: 0; padding-left: 0; }
  .ledger > div + div { border-top: 1px solid var(--line); }
  .tide-grid { grid-template-columns: 1fr 1fr; }
  .tide:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .tide:nth-child(4) { border-top: 1px solid var(--line); }
  .route-map { display: none; }
  .sea-grid { grid-template-columns: 1fr; }
  .sea-card { border-left: 0; }
  .sea-card + .sea-card { border-top: 1px solid var(--line); }
  .sea-card p { font-size: 12.5px; }
  .plates { grid-template-columns: 1fr; gap: 48px; }
  .fig-b { margin-top: 0; }
  .clauses { grid-template-columns: 1fr; }
  .ticket-head { flex-direction: column; gap: 12px; }
  .ticket-meta { text-align: left; }
  .ticket-foot { flex-direction: column; align-items: flex-start; }
  .seal { align-self: flex-end; }
  .footer-links { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .hero-title { font-size: 36px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .mood-window .phone { --phone-w: min(64vw, 196px); }
  .plate .phone { width: 100%; }
  .plate-tag, .plate figcaption { width: 100%; }
  .footer-word { font-size: 54px; }
}

/* ============ 减弱动态 ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .route path { animation: none; }
  .scroll-cue i::after { animation: none; opacity: .8; }
}