/* =========================================================
   无线设备电量 — 站点样式
   色板与桌面端 Themes/Dark.xaml 保持一致，保证跨端观感统一。
   字体刻意使用系统栈：Google Fonts 在国内不可达，会拖慢首屏。
   ========================================================= */

:root {
    --bg: #0a0b0d;
    --surface: #121316;
    --surface-2: #17181c;
    --line: rgba(255, 255, 255, 0.07);
    --line-strong: rgba(255, 255, 255, 0.12);

    --text: #e9eaec;
    --text-2: #9aa0a6;
    --text-3: #6c7178;

    --accent: #4c9aff;
    --accent-dim: rgba(76, 154, 255, 0.12);

    --good: #4cc15a;
    --low: #e8b04b;
    --critical: #f07167;

    --r-card: 10px;
    --r-chip: 6px;
    --r-pill: 999px;

    --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
    --dur: 200ms;

    --maxw: 1080px;

    --font: "Segoe UI Variable Text", "Segoe UI", -apple-system, "PingFang SC",
        "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-display: "Segoe UI Variable Display", "Segoe UI", "PingFang SC",
        "Microsoft YaHei UI", sans-serif;
}

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

/*
  作者样式里的 display:flex 会盖掉浏览器对 [hidden] 的默认 display:none，
  导致 hidden 元素照样显示。这里统一压住。
*/
[hidden] {
    display: none !important;
}

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

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* 顶部一层极淡的光晕，避免纯黑显得死板 */
body::before {
    content: "";
    position: fixed;
    inset: -20% -10% auto -10%;
    height: 560px;
    background: radial-gradient(
        60% 60% at 50% 0%,
        rgba(76, 154, 255, 0.09),
        transparent 70%
    );
    pointer-events: none;
    z-index: 0;
}

.wrap {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

a {
    color: inherit;
    text-decoration: none;
}

::selection {
    background: rgba(76, 154, 255, 0.3);
}

/* ---------------------------------------------- 顶栏 */

.nav {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(14px);
    background: rgba(10, 11, 13, 0.72);
    border-bottom: 1px solid var(--line);
}

.nav-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 60px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.brand svg {
    width: 20px;
    height: 20px;
    flex: none;
}

.nav-links {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 26px;
    font-size: 14px;
    color: var(--text-2);
}

.nav-links a {
    transition: color var(--dur) var(--ease);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--text);
}

@media (max-width: 640px) {
    .nav-links {
        gap: 16px;
        font-size: 13px;
    }
}

/* ---------------------------------------------- 通用块 */

section {
    padding: 96px 0;
    position: relative;
}

@media (max-width: 720px) {
    section {
        padding: 64px 0;
    }
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12.5px;
    letter-spacing: 0.04em;
    color: var(--text-2);
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--r-pill);
    padding: 6px 12px;
}

.eyebrow .dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--good);
    box-shadow: 0 0 0 3px rgba(76, 193, 90, 0.16);
}

h1,
h2,
h3 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.025em;
    margin: 0;
    text-wrap: balance;
}

h1 {
    font-size: clamp(38px, 6.2vw, 68px);
    line-height: 1.06;
}

h2 {
    font-size: clamp(24px, 3.2vw, 34px);
    line-height: 1.2;
}

h3 {
    font-size: 16.5px;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.lede {
    font-size: clamp(15.5px, 1.7vw, 18px);
    color: var(--text-2);
    line-height: 1.7;
    max-width: 56ch;
    text-wrap: pretty;
}

.section-head {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 44px;
    max-width: 62ch;
}

/* ---------------------------------------------- Hero */

.hero {
    padding: 84px 0 72px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: center;
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 44px;
    }
}

.hero-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
}

.hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    padding: 0 20px;
    border-radius: 8px;
    font-size: 14.5px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform var(--dur) var(--ease),
        background var(--dur) var(--ease), border-color var(--dur) var(--ease),
        opacity var(--dur) var(--ease);
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--accent);
    color: #06101f;
    font-weight: 600;
}

.btn-primary:hover {
    background: #62a8ff;
}

.btn-ghost {
    background: var(--surface);
    border-color: var(--line-strong);
    color: var(--text);
}

.btn-ghost:hover {
    background: var(--surface-2);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.btn-lg {
    height: 50px;
    padding: 0 26px;
    font-size: 15.5px;
    border-radius: 9px;
}

/* 顶栏右侧的下载入口，做成实心让它在导航里跳出来 */
.nav-cta {
    padding: 7px 15px;
    border-radius: 7px;
    background: var(--accent);
    color: #06101f !important;
    font-weight: 600;
    font-size: 13.5px;
    transition: background var(--dur) var(--ease);
}

.nav-cta:hover {
    background: #62a8ff;
}

/* 首屏下载条：主按钮 + 版本事实 */
.dl-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-top: 2px;
}

.dl-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.hero-hint {
    margin: 0;
    font-size: 12.5px;
    color: var(--text-3);
}

.dl-head {
    display: flex;
    align-items: center;
    gap: 14px;
}

/* 分段下载的进度条 */
.dl-progress {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.dl-progress-track {
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.09);
    overflow: hidden;
}

.dl-progress-track i {
    display: block;
    width: 0;
    height: 100%;
    border-radius: 3px;
    background: var(--accent);
    transition: width 0.18s linear;
}

.dl-progress-text {
    margin: 0;
    font-size: 12.5px;
    color: var(--text-2);
    font-variant-numeric: tabular-nums;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 12.5px;
    color: var(--text-3);
    margin-top: 6px;
}

.hero-meta span::before {
    content: "·";
    margin-right: 10px;
    color: var(--text-3);
}

.hero-meta span:first-child::before {
    content: none;
}

/* ---------------------------------------------- 悬浮窗示意 */

.hud-stage {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 260px;
    position: relative;
}

/* 背景点阵，制造"桌面壁纸"的暗示 */
.hud-stage::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(
        rgba(255, 255, 255, 0.06) 1px,
        transparent 1px
    );
    background-size: 22px 22px;
    mask-image: radial-gradient(70% 70% at 50% 50%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(
        70% 70% at 50% 50%,
        #000 30%,
        transparent 75%
    );
}

.hud {
    position: relative;
    min-width: 168px;
    padding: 13px 16px;
    border-radius: 10px;
    background: rgba(26, 26, 30, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.24);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(6px);
    animation: hud-float 7s var(--ease) infinite;
}

@keyframes hud-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.hud-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 3.5px 0;
}

.hud-row + .hud-row {
    margin-top: 2px;
}

.hud-row svg {
    width: 17px;
    height: 17px;
    flex: none;
}

.hud-pct {
    margin-left: auto;
    font-size: 13px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.hud-note {
    margin-top: 14px;
    font-size: 11.5px;
    color: var(--text-3);
    text-align: center;
}

/* ---------------------------------------------- 特性网格 */
/* hairline 网格：靠 1px 分隔线成组，不用彩色左边框那种老套路 */

.features {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.feature {
    padding: 30px 28px 32px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.014), transparent);
    transition: background var(--dur) var(--ease);
}

.feature:hover {
    background: rgba(255, 255, 255, 0.032);
}

.feature .mark {
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    margin-bottom: 16px;
}

.feature .mark svg {
    width: 16px;
    height: 16px;
}

.feature p {
    margin: 9px 0 0;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.68;
    text-wrap: pretty;
}

@media (max-width: 720px) {
    .features {
        grid-template-columns: 1fr;
    }
}

/* ---------------------------------------------- 限制表 */

.limit-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.limit-table th {
    text-align: left;
    font-weight: 500;
    font-size: 12px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-3);
    padding: 0 16px 12px 0;
    border-bottom: 1px solid var(--line);
}

.limit-table td {
    padding: 16px 16px 16px 0;
    border-bottom: 1px solid var(--line);
    color: var(--text-2);
    vertical-align: top;
}

.limit-table td:first-child {
    color: var(--text);
    font-weight: 500;
    white-space: nowrap;
}

.verdict {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 12.5px;
    font-weight: 500;
}

.verdict::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.verdict.yes {
    color: var(--good);
}

.verdict.no {
    color: var(--critical);
}

.verdict.wip {
    color: var(--low);
}

@media (max-width: 720px) {
    .limit-table thead {
        display: none;
    }

    .limit-table tr {
        display: grid;
        gap: 4px;
        padding: 16px 0;
        border-bottom: 1px solid var(--line);
    }

    .limit-table td {
        padding: 0;
        border: 0;
    }
}

/* ---------------------------------------------- 主界面示意 */

.preview {
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    background: var(--surface);
    overflow: hidden;
}

.preview-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 14px;
    border-bottom: 1px solid var(--line);
    background: var(--surface-2);
}

.preview-bar .lamp {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
}

.preview-title {
    margin-left: 6px;
    font-size: 12px;
    color: var(--text-3);
}

.preview-body {
    padding: 0;
}

.grid-row {
    display: grid;
    grid-template-columns: 1.6fr 0.9fr 0.9fr 1.5fr 0.9fr;
    gap: 12px;
    align-items: center;
    padding: 13px 16px;
    border-bottom: 1px solid var(--line);
    font-size: 13px;
}

.grid-row:last-child {
    border-bottom: 0;
}

.grid-row.head {
    font-size: 11.5px;
    letter-spacing: 0.04em;
    color: var(--text-3);
    border-bottom: 1px solid var(--line);
}

.grid-row .name {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 600;
    color: var(--text);
    min-width: 0;
}

.grid-row .name svg {
    width: 16px;
    height: 16px;
    flex: none;
}

.grid-row .name span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.grid-row .muted {
    color: var(--text-2);
}

.battery-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}

.bar {
    flex: 1;
    height: 5px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.09);
    overflow: hidden;
    min-width: 40px;
}

.bar i {
    display: block;
    height: 100%;
    border-radius: 3px;
    background: var(--good);
}

.bar.i-low i {
    background: var(--low);
}

.bar.i-crit i {
    background: var(--critical);
}

.pct {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    font-size: 13px;
    min-width: 34px;
    text-align: right;
}

.pct.dim {
    font-weight: 400;
    color: var(--text-3);
    font-size: 12px;
}

@media (max-width: 780px) {
    .grid-row {
        grid-template-columns: 1.4fr 1fr;
        row-gap: 8px;
    }

    .grid-row.head,
    .grid-row .hide-sm {
        display: none;
    }
}

/* ---------------------------------------------- 下载页 */

.dl-card {
    border: 1px solid var(--line-strong);
    border-radius: var(--r-card);
    background: linear-gradient(
        180deg,
        rgba(76, 154, 255, 0.06),
        rgba(255, 255, 255, 0.012)
    );
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.dl-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 11px;
    border-radius: var(--r-chip);
    border: 1px solid var(--line);
    background: var(--surface);
    font-size: 12px;
    color: var(--text-2);
    font-variant-numeric: tabular-nums;
}

.spec-list {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 12px 28px;
    font-size: 14px;
    margin: 0;
}

.spec-list dt {
    color: var(--text-3);
}

.spec-list dd {
    margin: 0;
    color: var(--text-2);
}

code,
.mono {
    font-family: ui-monospace, "Cascadia Mono", "Consolas", monospace;
    font-size: 0.92em;
    background: rgba(255, 255, 255, 0.055);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 1px 6px;
    color: var(--text);
}

.faq {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--line);
}

.faq details {
    border-bottom: 1px solid var(--line);
    padding: 18px 0;
}

.faq summary {
    cursor: pointer;
    font-size: 14.5px;
    font-weight: 500;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.faq summary::-webkit-details-marker {
    display: none;
}

.faq summary::after {
    content: "+";
    color: var(--text-3);
    font-weight: 400;
    font-size: 18px;
    transition: transform var(--dur) var(--ease);
}

.faq details[open] summary::after {
    transform: rotate(45deg);
}

.faq p {
    margin: 12px 0 0;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.72;
    text-wrap: pretty;
}

/* ---------------------------------------------- 提示条 */

.notice {
    display: flex;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid rgba(232, 176, 75, 0.28);
    background: rgba(232, 176, 75, 0.07);
    border-radius: 8px;
    font-size: 13.5px;
    color: #f0d9a8;
    line-height: 1.65;
}

.notice svg {
    width: 16px;
    height: 16px;
    flex: none;
    margin-top: 3px;
}

/* ---------------------------------------------- 页脚 */

footer {
    border-top: 1px solid var(--line);
    padding: 34px 0 46px;
    font-size: 12.5px;
    color: var(--text-3);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
}

.footer-inner nav {
    display: flex;
    gap: 20px;
}

.footer-inner a {
    transition: color var(--dur) var(--ease);
}

.footer-inner a:hover {
    color: var(--text-2);
}

/* ---------------------------------------------- 入场动画 */

.reveal {
    opacity: 0;
    transform: translateY(14px);
}

.reveal.in {
    opacity: 1;
    transform: none;
    transition: opacity 620ms var(--ease), transform 620ms var(--ease);
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}