/* 三溪寻影官网：明亮、温暖，“三条溪”（画面、声音、文字）汇进一个搜索框
   layout: 窄栏阅读 + 宽幅演示块；溪水青为主色，阳光黄只做强调 */
/* 字体放在网站自己的 fonts/ 下（子集，SIL OFL 1.1），不从 Google Fonts 加载：国内访问不稳定 */
@font-face { font-family: "ZCOOL XiaoWei"; src: url("fonts/zcool-xiaowei.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "Bricolage Grotesque"; src: url("fonts/bricolage.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains-mono.woff2") format("woff2"); font-weight: 100 800; font-display: swap; }
:root {
  --paper: #F6FAF6;
  --paper-2: #EAF3EC;
  --card: #FFFFFF;
  --ink: #1D3331;
  --ink-2: #4E6461;
  --ink-3: #7B8F8B;
  --line: #D6E4DB;
  --brook: #1C8780;
  --brook-ink: #FFFFFF;
  --brook-soft: #D4EEE9;
  --sun: #F2B33D;
  --sun-soft: #FFF0C9;
  --sun-ink: #6B4A06;
  --mint: #9ADBC9;
  --rose: #F27F95;
  --shadow: 0 1px 2px rgba(29, 51, 49, .06), 0 8px 24px rgba(29, 51, 49, .08);
  --f-display: "ZCOOL XiaoWei", "Noto Serif SC", "Songti SC", serif;
  --f-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --f-latin: "Bricolage Grotesque", "Noto Sans SC", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --r: 14px;
  --wrap: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0F1A19; --paper-2: #14231F; --card: #172826; --ink: #E4F0EC; --ink-2: #A8BDB8; --ink-3: #7F958F;
    --line: #27403C; --brook: #4CC0B6; --brook-ink: #08201E; --brook-soft: #173A36; --sun: #F4C25B; --sun-soft: #3A3018;
    --sun-ink: #F7DFA6; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0F1A19; --paper-2: #14231F; --card: #172826; --ink: #E4F0EC; --ink-2: #A8BDB8; --ink-3: #7F958F;
  --line: #27403C; --brook: #4CC0B6; --brook-ink: #08201E; --brook-soft: #173A36; --sun: #F4C25B; --sun-soft: #3A3018;
  --sun-ink: #F7DFA6; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35); color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
.nw { white-space: nowrap; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.75 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--paper);
}
a { color: var(--brook); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--sun); outline-offset: 2px; border-radius: 6px; }
img { max-width: 100%; }
h1, h2, h3 { text-wrap: balance; margin: 0; line-height: 1.25; }
h1, h2 { font-family: var(--f-display); font-weight: 400; letter-spacing: .02em; }
h3 { font-size: 1.12rem; font-weight: 700; }
p { margin: 0; }
.wrap {
  max-width: var(--wrap); margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.eyebrow { font-size: .8rem; letter-spacing: .14em; color: var(--brook); font-weight: 700; }
.lead { font-size: 1.1rem; color: var(--ink-2); max-width: 38em; }
.muted { color: var(--ink-3); }

/* 顶栏 */
.nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 9; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 20px; min-height: 64px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 36px; height: 36px; }
.brand b { font-family: var(--f-display); font-weight: 400; font-size: 1.35rem; letter-spacing: .04em; }
.brand small { font-family: var(--f-latin); color: var(--ink-3); font-size: .78rem; letter-spacing: .02em; }
.nav ul { display: flex; gap: 4px; list-style: none; margin: 0 0 0 auto; padding: 0; flex-wrap: wrap; }
.nav li { flex: none; }
.nav li a { white-space: nowrap; display: block; padding: 6px 12px; border-radius: 999px; color: var(--ink-2); text-decoration: none; font-size: .95rem; }
.nav li a:hover, .nav li a[aria-current="page"] { background: var(--brook-soft); color: var(--ink); }
.nav li a.lang { border: 1px solid var(--line); font-size: .85rem; }
/* 英文页面：标题用 Bricolage，正文用系统字体 */
html:lang(en) { --f-display: "Bricolage Grotesque", system-ui, sans-serif; --f-body: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif; }
html:lang(en) h1, html:lang(en) h2, html:lang(en) .brand b { font-weight: 650; letter-spacing: -.01em; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px; font: 600 1rem var(--f-body); text-decoration: none; border: 1.5px solid transparent; cursor: pointer; }
.btn-main { background: var(--brook); color: var(--brook-ink); }
.btn-main:hover { filter: brightness(1.06); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--brook); }
.btn small { font-weight: 400; opacity: .8; font-size: .82rem; }

section { padding-block: 72px; }
.sec-head { display: grid; gap: 10px; margin-bottom: 36px; }
.sec-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); }
.grid { display: grid; gap: 20px; }
.grid > * { min-width: 0; }

/* 页脚 */
footer { border-top: 1px solid var(--line); background: var(--paper-2); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 24px 48px; padding-block: 36px 84px; font-size: .9rem; color: var(--ink-2); }
footer .f-brand { display: grid; gap: 4px; max-width: 26em; }
footer .f-brand b { font-family: var(--f-display); font-weight: 400; font-size: 1.2rem; color: var(--ink); }
footer nav { display: grid; gap: 6px; }
footer nav a { color: var(--ink-2); text-decoration: none; }
footer nav a:hover { color: var(--brook); }
footer .copy { flex-basis: 100%; color: var(--ink-3); font-size: .82rem; }

/* 文章页（帮助、协议） */
.page-head { padding-block: 56px 28px; }
.page-head h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
.page-head p { margin-top: 12px; }
.prose { max-width: 46em; }
.prose h2 { font-size: 1.5rem; margin: 40px 0 14px; }
.prose h3 { margin: 22px 0 6px; }
.prose p + p { margin-top: 10px; }
.legal { white-space: pre-wrap; font-size: .97rem; color: var(--ink); max-width: 46em; }

kbd { font-family: var(--f-mono); font-size: .82em; padding: 1px 6px; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; background: var(--card); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (max-width: 640px) {
  section { padding-block: 52px; }
  .nav ul { margin-left: 0; width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 8px; }
}

/* ===== 季节与天色（weather.js 设置 data-season / data-time；不联网，按访客电脑上的日期时间） ===== */
:root { --sky: #DCEFF5; --s1: var(--brook); --s2: var(--mint); --s3: var(--sun); }
:root[data-time="morning"] { --sky: #FFE7B3; }
:root[data-time="day"] { --sky: #D6EEF6; }
:root[data-time="dusk"] { --sky: #FFD0B5; }
:root[data-time="night"] { --sky: #C7D0EC; }
:root[data-season="spring"] { --s1: #E77F9A; --s2: #9ADBC9; --s3: #F2C94C; }
:root[data-season="autumn"] { --s1: #D9653B; --s2: #E8A04A; --s3: #C9A227; }
:root[data-season="winter"] { --s1: #7FB3D1; --s2: #B9D7E3; --s3: #A6B9C6; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --sky: #183039; }
  :root:not([data-theme="light"])[data-time="morning"] { --sky: #3A3420; }
  :root:not([data-theme="light"])[data-time="day"] { --sky: #183039; }
  :root:not([data-theme="light"])[data-time="dusk"] { --sky: #3E2A26; }
  :root:not([data-theme="light"])[data-time="night"] { --sky: #141C36; }
}
:root[data-theme="dark"] { --sky: #183039; }
:root[data-theme="dark"][data-time="morning"] { --sky: #3A3420; }
:root[data-theme="dark"][data-time="day"] { --sky: #183039; }
:root[data-theme="dark"][data-time="dusk"] { --sky: #3E2A26; }
:root[data-theme="dark"][data-time="night"] { --sky: #141C36; }
.sky { position: absolute; inset: 0 0 auto 0; height: 720px; background: linear-gradient(var(--sky), transparent); pointer-events: none; z-index: 0; transition: background .6s; }
#weather { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }
main, footer { position: relative; z-index: 1; }
.pet-btn { position: relative; display: inline-block; padding: 0; border: 0; background: none; cursor: pointer; line-height: 0; }
.pet-btn img { display: block; width: 100%; }
.pet-btn.boing img { animation: boing .5s ease-out 1 !important; }
@keyframes boing { 30% { scale: 1.12 .86; } 60% { scale: .94 1.08; } }
.pet-say { position: absolute; bottom: 100%; left: 50%; translate: -50% -6px; width: max-content; max-width: 220px; padding: 6px 12px; border-radius: 12px; background: var(--card); color: var(--ink); border: 1px solid var(--line); box-shadow: var(--shadow); font: 500 .86rem/1.5 var(--f-body); white-space: normal; text-align: center; opacity: 0; transition: opacity .25s; pointer-events: none; z-index: 5; }
.pet-say.on { opacity: 1; }
.season { position: fixed; z-index: 8; right: calc(16px + env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px)); }
.season > button { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink); box-shadow: var(--shadow); font: 500 .86rem var(--f-body); cursor: pointer; }
.season .panel { position: absolute; right: 0; bottom: calc(100% + 8px); width: 248px; padding: 14px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; gap: 10px; }
.season .panel p { font-size: .78rem; color: var(--ink-3); letter-spacing: .08em; }
.season .opts { display: flex; flex-wrap: wrap; gap: 6px; }
.season .opts button { font: 500 .84rem var(--f-body); padding: 3px 11px; border-radius: 999px; border: 1px solid var(--line); background: var(--paper); color: var(--ink-2); cursor: pointer; }
.season .opts button[aria-pressed="true"] { background: var(--brook-soft); border-color: var(--brook); color: var(--ink); }