/* EVCC 站点群设计系统 —— “技术手册 / 仪表铭牌”
 * 纸面 + 墨色 + 信号绿；DIN 用于数字与拉丁字，等宽字体用于标注与图注。
 * 日间（冷灰）/ 夜间两套配色，由 html[data-theme] 切换；未手动选择时跟随系统。
 */

:root,
:root[data-theme="light"] {
  --paper: #eceef0;
  --paper-2: #e2e5e9;
  --paper-3: #f7f8f9;
  --ink: #0e1013;
  --ink-2: #2c3036;
  --mute: #646a73;
  --faint: #979da6;
  --rule: #d3d7dc;
  --rule-2: #b7bdc5;
  --top-bg: rgba(236, 238, 240, 0.86);
  --grain: 0.04;
  --signal: #00b88f;
  --signal-ink: #00775c;
  --signal-soft: rgba(0, 184, 143, 0.13);
  --amber: #a8670a;
  --amber-soft: rgba(214, 140, 30, 0.15);
  --night: #0b0c0f;
  --night-2: #131519;
  --night-3: #1b1e24;
  --night-ink: #ecedef;
  --night-mute: #8c9099;
  --night-rule: rgba(255, 255, 255, 0.1);
  --frame: #0b0c0f;
  --shadow: 0 30px 60px -30px rgba(15, 16, 19, 0.5);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --paper: #0f1114; --paper-2: #15181c; --paper-3: #191c21;
  --ink: #eceef1; --ink-2: #c4c8cf; --mute: #8a909a; --faint: #5e646d;
  --rule: rgba(255, 255, 255, 0.09); --rule-2: rgba(255, 255, 255, 0.18);
  --top-bg: rgba(15, 17, 20, 0.82); --grain: 0.03;
  --signal-ink: #2fd5a8; --signal-soft: rgba(47, 213, 168, 0.14);
  --amber: #f0b04e; --amber-soft: rgba(240, 176, 78, 0.14);
  --night: #07080a; --night-2: #101215; --night-3: #16191d;
  --frame: #050607;
  --shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.8);
  color-scheme: dark;
}

:root {
  --din: "DIN Alternate", "Bahnschrift", "D-DIN", "DIN Next", "Barlow", "Roboto Condensed", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, "PingFang SC", monospace;
  --wrap: 1240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  background-color: var(--paper);
  color: var(--ink);
  font: 400 16px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color 0.25s, color 0.25s;
}
/* 细纸纹：很淡的噪点，避免大面积纯色发“平” */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: var(--grain);
  background-image: 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='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: var(--signal); color: #0b0c0f; }
:focus-visible { outline: 2px solid var(--signal-ink); outline-offset: 3px; }

.wrap { width: min(var(--wrap), 100% - 56px); margin-inline: auto; }
.mono { font-family: var(--mono); }
.din { font-family: var(--din); }
.icon { width: 1.1em; height: 1.1em; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* ---------- 文字 ---------- */
.idx { display: inline-flex; align-items: center; gap: 9px; font: 500 12px/1 var(--mono); letter-spacing: 0.06em; color: var(--mute); text-transform: uppercase; }
.idx::before { content: ""; width: 7px; height: 7px; background: var(--signal); flex: none; }
.h-xl { font-size: clamp(42px, 6.6vw, 92px); line-height: 1.14; letter-spacing: -0.022em; font-weight: 700; }
.h-l { font-size: clamp(30px, 4vw, 50px); line-height: 1.2; letter-spacing: -0.015em; font-weight: 700; }
.h-m { font-size: clamp(22px, 2.3vw, 29px); line-height: 1.3; letter-spacing: -0.01em; font-weight: 700; }
html[lang^="en"] .h-xl { letter-spacing: -0.03em; line-height: 1.06; }
html[lang^="en"] .h-l { letter-spacing: -0.025em; }
.u { text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 0.1em; text-underline-offset: 0.16em; text-decoration-skip-ink: none; }
.note { font-size: 13px; color: var(--mute); }

/* 关键词行：每一项不拆行，分隔点由样式生成 */
.kv { font: 500 12px/1.5 var(--mono); color: var(--mute); }
.kvs { display: flex; flex-wrap: wrap; gap: 6px 0; font: 500 12.5px/1.5 var(--mono); color: var(--ink-2); }
.kvs > span { white-space: nowrap; }
.kvs > span + span::before { content: "·"; margin: 0 10px; color: var(--faint); }

/* ---------- 顶栏 ---------- */
.top { position: sticky; top: 0; z-index: 50; background: var(--top-bg); -webkit-backdrop-filter: blur(14px) saturate(1.3); backdrop-filter: blur(14px) saturate(1.3); border-bottom: 1px solid var(--rule); }
.top-in { height: 62px; display: flex; align-items: center; gap: 28px; }
.mark { display: inline-flex; align-items: center; gap: 10px; white-space: nowrap; }
.mark img { width: 30px; height: 30px; border-radius: 8px; box-shadow: 0 0 0 1px var(--rule); flex: none; }
.mark b { font: 700 23px/1 var(--din); letter-spacing: 0.02em; }
.mark span { font: 500 11.5px/1 var(--mono); color: var(--mute); letter-spacing: 0.04em; padding-left: 10px; border-left: 1px solid var(--rule-2); }
.links { display: flex; gap: 22px; font-size: 14.5px; color: var(--ink-2); }
.links a { position: relative; padding: 6px 0; display: inline-flex; align-items: center; gap: 3px; white-space: nowrap; }
.links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--signal); transition: right 0.22s ease; }
.links a:hover::after { right: 0; }
.links .icon { width: 0.85em; height: 0.85em; color: var(--faint); }
.spacer { flex: 1; }
.burger { display: none; width: 40px; height: 40px; place-items: center; border: 1px solid var(--rule-2); border-radius: 6px; }
.lang { height: 36px; min-width: 44px; padding: 0 10px; border: 1px solid var(--rule-2); border-radius: 6px; font: 600 12.5px/1 var(--mono); color: var(--ink-2); }
.lang:hover { border-color: var(--ink); color: var(--ink); }
.theme-btn { width: 36px; height: 36px; display: inline-grid; place-items: center; border: 1px solid var(--rule-2); border-radius: 6px; color: var(--ink-2); flex: none; }
.theme-btn:hover { border-color: var(--ink); color: var(--ink); }
.theme-btn .icon { width: 17px; height: 17px; }
.theme-btn .i-sun { display: none; }
:root[data-theme="dark"] .theme-btn .i-sun { display: block; }
:root[data-theme="dark"] .theme-btn .i-moon { display: none; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; height: 46px; padding: 0 20px; border-radius: 6px; font-weight: 600; font-size: 15px; white-space: nowrap; transition: background 0.18s, color 0.18s, border-color 0.18s, opacity 0.18s; }
.btn .icon { width: 1.05em; height: 1.05em; }
.btn .arr { transition: transform 0.2s; }
.btn:hover .arr { transform: translateX(3px); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { opacity: 0.86; }
.btn-line { border: 1.5px solid var(--ink); color: var(--ink); }
.btn-line:hover { background: var(--ink); color: var(--paper); }
.btn-signal { background: var(--signal); color: #0b0c0f; }
.btn-signal:hover { background: #12cfa2; }
.btn-ghost { color: var(--ink-2); padding: 0 0 3px; height: auto; border-bottom: 1.5px solid var(--rule-2); border-radius: 0; font-size: 14px; }
.btn-ghost:hover { border-color: var(--signal); color: var(--ink); }
.btn-s { height: 38px; padding: 0 15px; font-size: 13.5px; }
.on-night .btn-line { border-color: var(--night-ink); color: var(--night-ink); }
.on-night .btn-line:hover { background: var(--night-ink); color: var(--night); }

/* ---------- 标签 ---------- */
.part { display: inline-flex; align-items: center; gap: 3px; font: 600 11px/1 var(--mono); letter-spacing: 0.02em; color: var(--amber); background: var(--amber-soft); padding: 4px 6px; border-radius: 3px; white-space: nowrap; }
.part::before { content: "*"; }
.on-night .part { color: #f0b04e; background: rgba(240, 176, 78, 0.14); }

/* ---------- 图框：深色“屏幕” + 裁切角标 + 图注 ---------- */
.crop {
  --c: var(--ink-2); --l: 14px;
  padding: 12px;
  background:
    linear-gradient(var(--c), var(--c)) top left / var(--l) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) top left / 1px var(--l) no-repeat,
    linear-gradient(var(--c), var(--c)) top right / var(--l) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) top right / 1px var(--l) no-repeat,
    linear-gradient(var(--c), var(--c)) bottom left / var(--l) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) bottom left / 1px var(--l) no-repeat,
    linear-gradient(var(--c), var(--c)) bottom right / var(--l) 1px no-repeat,
    linear-gradient(var(--c), var(--c)) bottom right / 1px var(--l) no-repeat;
}
.on-night .crop { --c: rgba(255, 255, 255, 0.35); }
.screen { background: var(--frame); border-radius: 10px; padding: 7px; box-shadow: var(--shadow); }
:root[data-theme="dark"] .screen { box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.07), var(--shadow); }
.screen > img, .screen > video { width: 100%; border-radius: 5px; aspect-ratio: 16 / 10; object-fit: cover; background: #0c1118; }
.cap { display: flex; justify-content: space-between; gap: 16px; margin-top: 10px; font: 500 11.5px/1.45 var(--mono); color: var(--mute); letter-spacing: 0.02em; }
.cap b { color: var(--ink); font-weight: 600; margin-right: 4px; }
.on-night .cap { color: var(--night-mute); }
.on-night .cap b { color: var(--night-ink); }

/* ---------- 版块 ---------- */
.sec { padding: 120px 0; border-top: 1px solid var(--rule); position: relative; }
.sec-head { display: grid; gap: 22px; margin-bottom: 64px; }
.sec-no { display: flex; align-items: center; gap: 14px; font: 700 14px/1 var(--din); color: var(--ink); letter-spacing: 0.06em; }
.sec-no::after { content: ""; width: 64px; height: 1px; background: var(--rule-2); }
.night { background: var(--night); color: var(--night-ink); border-top: 0; }
.night .sec-no { color: var(--night-ink); }
.night .sec-no::after { background: var(--night-rule); }
.night .note, .night .kv { color: var(--night-mute); }
:root[data-theme="dark"] .night { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }

/* ---------- 下载组件（三站共用） ---------- */
.seg { display: inline-flex; border: 1.5px solid var(--ink); border-radius: 6px; overflow: hidden; }
.seg button { height: 34px; padding: 0 14px; font-size: 13.5px; font-weight: 600; color: var(--ink-2); display: inline-flex; align-items: center; gap: 7px; }
.seg button + button { border-left: 1.5px solid var(--ink); }
.seg button.on { background: var(--ink); color: var(--paper); }
.seg button small { font: 600 10.5px/1 var(--mono); color: var(--signal-ink); }
.seg button.on small { color: var(--signal); }
.dl-ver { font: 700 clamp(48px, 6vw, 76px)/1 var(--din); letter-spacing: -0.01em; display: flex; align-items: baseline; gap: 4px; }
.dl-ver .v { font-size: 0.42em; color: var(--mute); }
.dl-meta { font: 500 12.5px/1.6 var(--mono); color: var(--mute); display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: 14px; }
.dl-act { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 20px; margin-top: 28px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--signal); display: inline-block; flex: none; box-shadow: 0 0 0 0 rgba(0, 184, 143, 0.5); animation: ping 2.4s infinite; }
@keyframes ping { 70% { box-shadow: 0 0 0 8px rgba(0, 184, 143, 0); } 100% { box-shadow: 0 0 0 0 rgba(0, 184, 143, 0); } }
.skel { color: var(--faint); font: 500 13px var(--mono); padding: 24px 0; }

.vlist li { display: grid; grid-template-columns: 110px 1fr auto; gap: 16px; align-items: center; padding: 15px 0; border-top: 1px solid var(--rule); }
.vlist li:last-child { border-bottom: 1px solid var(--rule); }
.vlist .v { font: 700 18px/1 var(--din); }
.vlist .m { font: 500 12.5px/1.5 var(--mono); color: var(--mute); }
.clog article { padding: 20px 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 110px 1fr; gap: 16px; }
.clog h3 { font: 700 18px/1.3 var(--din); }
.clog li { color: var(--ink-2); font-size: 14.5px; line-height: 1.7; padding-left: 14px; position: relative; }
.clog li + li { margin-top: 6px; }
.clog li::before { content: ""; position: absolute; left: 0; top: 0.78em; width: 5px; height: 1.5px; background: var(--signal-ink); }
.tag-new { font: 600 10.5px/1 var(--mono); color: var(--signal-ink); background: var(--signal-soft); padding: 3px 5px; border-radius: 3px; margin-left: 6px; vertical-align: 3px; }
.empty { padding: 24px 0; color: var(--mute); font-size: 14px; }

/* 弹层（更新日志 / 历史版本） */
dialog.dlg { border: 0; padding: 0; margin: auto; width: min(720px, calc(100% - 28px)); max-height: min(82vh, 860px); background: var(--paper-3); color: var(--ink); border-radius: 12px; box-shadow: 0 40px 100px -30px rgba(0, 0, 0, 0.55); }
dialog.dlg::backdrop { background: rgba(15, 16, 19, 0.55); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.dlg-head { position: sticky; top: 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 24px; background: var(--paper-3); border-bottom: 1px solid var(--rule); z-index: 1; }
.dlg-head b { font-size: 17px; }
.dlg-head .kv { margin-left: 10px; }
.dlg-body { padding: 4px 24px 24px; overflow: auto; }
.dlg-x { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--rule-2); border-radius: 6px; }
.dlg-more { margin-top: 18px; }

/* ---------- 作者微信卡片（官网与用户中心共用） ---------- */
.qr { background: var(--paper-3); color: var(--ink); border: 1px solid var(--rule); border-radius: 10px; padding: 18px; display: grid; grid-template-columns: 128px 1fr; gap: 20px; align-items: center; }
.qr img { width: 128px; height: 128px; object-fit: cover; border-radius: 4px; background: #fff; }
.qr b { font-size: 17px; display: block; margin-bottom: 6px; }
.qr p { font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }
.qr .tag-buyer { display: inline-block; margin-top: 10px; font: 600 11.5px/1 var(--mono); color: var(--signal-ink); background: var(--signal-soft); padding: 5px 7px; border-radius: 3px; }

/* 增值功能角标 */
.addon { display: inline-flex; align-items: center; gap: 2px; font: 600 11px/1 var(--mono); letter-spacing: 0.02em; color: var(--signal-ink); background: var(--signal-soft); padding: 4px 6px; border-radius: 3px; white-space: nowrap; }
.addon::before { content: "+"; }
.on-night .addon { color: #2fd5a8; background: rgba(47, 213, 168, 0.14); }
.tag-add { font: 600 10px/1 var(--mono); font-style: normal; color: var(--signal-ink); background: var(--signal-soft); padding: 2px 4px; border-radius: 3px; margin-left: 5px; vertical-align: 1px; }

/* 手机外框 */
.phone { background: var(--frame); border-radius: 34px; padding: 9px; box-shadow: var(--shadow); }
.phone > img { width: 100%; border-radius: 26px; aspect-ratio: 1320 / 2868; object-fit: contain; background: #f2f4f7; }

/* ---------- 页脚 ---------- */
.foot { border-top: 1px solid var(--rule); padding: 36px 0 44px; font-size: 13px; color: var(--mute); }
.foot-in { display: flex; flex-wrap: wrap; gap: 18px 48px; justify-content: space-between; align-items: flex-start; }
.foot p { max-width: 62ch; line-height: 1.8; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.foot a:hover { color: var(--ink); }

/* ---------- 入场 ---------- */
.rv { opacity: 0; transform: translateY(14px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1); }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .dot { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .links { display: none; position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px 28px 16px; background: var(--paper); border-bottom: 1px solid var(--rule); }
  .links.open { display: flex; }
  .links a { padding: 13px 0; border-bottom: 1px solid var(--rule); font-size: 16px; }
  .links a::after { display: none; }
  .burger { display: inline-grid; }
  .sec { padding: 84px 0; }
  .sec-head { margin-bottom: 40px; gap: 16px; }
}
@media (max-width: 600px) {
  .wrap { width: calc(100% - 32px); }
  .mark span { display: none; }
  .top-in { gap: 12px; }
  .h-xl { line-height: 1.16; }
  .vlist li { grid-template-columns: 1fr auto; }
  .vlist li .m { grid-column: 1 / -1; grid-row: 2; }
  .clog article { grid-template-columns: 1fr; gap: 6px; }
  .qr { grid-template-columns: 104px 1fr; gap: 16px; }
  .qr img { width: 104px; height: 104px; }
}