/* ==========================================================================
   TA 心里社 · 漂流书信
   设计令牌 / 布局 / 层次与动效
   ========================================================================== */

:root {
    --bg: #FDFBF7;
    --surface: #FFFFFF;
    --surface-soft: #EDF3EC;
    --surface-warm: #F7F4EE;
    --sage: #A8D5BA;
    --sage-hover: #97CCAA;
    --sage-deep: #648B73;
    --sage-ink: #284B3B;
    --text: #333333;
    --text-soft: #555555;
    --muted: #888888;
    --line: #E8E5DD;
    --line-strong: #DDD8CE;

    --radius-sm: 10px;
    --radius: 18px;
    --radius-lg: 28px;

    --container: 1280px;
    --narrow: 820px;

    --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
        system-ui, -apple-system, "Segoe UI", sans-serif;

    /* 非线性缓动 */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   基础
   ========================================================================== */

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

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

body {
    margin: 0;
    overflow-x: clip;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img,
svg {
    display: block;
    max-width: 100%;
}

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

button,
input,
textarea {
    font-family: inherit;
}

::selection {
    background: rgba(168, 213, 186, 0.45);
    color: var(--sage-ink);
}

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

[hidden] {
    display: none !important;
}

/* ==========================================================================
   滚动进度 / 布局
   ========================================================================== */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 80;
    width: 100%;
    height: 2px;
    background: var(--sage-deep);
    transform: scaleX(0);
    transform-origin: 0 50%;
    pointer-events: none;
}

.container {
    width: min(100% - 64px, var(--container));
    margin-inline: auto;
}

.section {
    position: relative;
    overflow: hidden;
    padding: 132px 0;
}

.section--tinted {
    background: var(--surface-warm);
}

.section--flush {
    padding-top: 32px;
}

.section__narrow {
    max-width: var(--narrow);
}

.section__title {
    margin: 12px 0 0;
    font-size: clamp(26px, 3.2vw, 40px);
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: 0.005em;
}

.section__head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 44px;
}

.section__watermark {
    position: absolute;
    top: 28px;
    right: 4%;
    z-index: 0;
    font-size: clamp(120px, 16vw, 240px);
    font-weight: 600;
    line-height: 1;
    letter-spacing: -0.04em;
    color: rgba(51, 51, 51, 0.035);
    pointer-events: none;
    user-select: none;
}

.section--tinted .section__watermark {
    color: rgba(100, 139, 115, 0.07);
}

.section__watermark--right {
    right: -1%;
}

.section > .container {
    position: relative;
    z-index: 1;
}

.eyebrow {
    margin: 0;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--sage-deep);
}

.prose {
    margin: 18px 0 0;
    color: var(--text-soft);
    font-size: 16.5px;
    line-height: 1.95;
}

/* ==========================================================================
   进场动画
   ========================================================================== */

.js [data-reveal] {
    opacity: 0;
    transform: translate3d(0, 38px, 0);
    transition:
        opacity 1.05s var(--ease-out-expo),
        transform 1.15s var(--ease-out-expo);
    transition-delay: var(--reveal-delay, 0s);
}

.js [data-reveal="scale"] {
    transform: translate3d(0, 28px, 0) scale(0.965);
}

.js [data-reveal].is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
}

.js main {
    animation: pageEnter 0.9s var(--ease-out-expo) both;
}

.js body.is-leaving {
    opacity: 0;
    transition: opacity 0.28s var(--ease-soft);
    pointer-events: none;
}

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translate3d(0, 12px, 0);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

/* ==========================================================================
   跳过导航
   ========================================================================== */

.skip-link {
    position: absolute;
    top: -60px;
    left: 16px;
    z-index: 90;
    padding: 10px 16px;
    border-radius: 0 0 12px 12px;
    background: var(--sage);
    color: var(--sage-ink);
    font-size: 14px;
    transition: top 0.4s var(--ease-out-expo);
}

.skip-link:focus {
    top: 0;
}

/* ==========================================================================
   页头
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    border-bottom: 1px solid transparent;
    background: rgba(253, 251, 247, 0.72);
    -webkit-backdrop-filter: blur(16px) saturate(1.15);
    backdrop-filter: blur(16px) saturate(1.15);
    transition:
        background 0.5s var(--ease-soft),
        border-color 0.5s var(--ease-soft);
}

.site-header.is-scrolled {
    border-bottom-color: var(--line);
    background: rgba(253, 251, 247, 0.9);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 20px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.brand__mark {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 13px;
    background: var(--sage);
    color: var(--sage-ink);
    transition: transform 0.6s var(--ease-spring);
}

.brand:hover .brand__mark {
    transform: rotate(-6deg) scale(1.05);
}

.brand__mark svg {
    width: 21px;
    height: 21px;
}

.brand__text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.brand__name {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.brand__sub {
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--muted);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.site-nav__link {
    position: relative;
    padding: 9px 16px;
    border-radius: 999px;
    font-size: 14px;
    color: var(--text-soft);
    transition:
        background 0.5s var(--ease-soft),
        color 0.5s var(--ease-soft);
}

.site-nav__link::after {
    content: "";
    position: absolute;
    right: 16px;
    bottom: 5px;
    left: 16px;
    height: 1px;
    background: var(--sage-deep);
    transform: scaleX(0);
    transform-origin: 0 50%;
    transition: transform 0.6s var(--ease-out-expo);
}

.site-nav__link:hover {
    background: rgba(168, 213, 186, 0.16);
    color: var(--sage-ink);
}

.site-nav__link:hover::after {
    transform: scaleX(1);
}

.site-nav__link.is-active {
    background: var(--surface-soft);
    color: var(--sage-ink);
    font-weight: 500;
}

.site-nav__link.is-active::after {
    display: none;
}

/* ==========================================================================
   按钮与链接
   ========================================================================== */

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 14px 28px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.5;
    cursor: pointer;
    transition:
        background 0.45s var(--ease-soft),
        color 0.45s var(--ease-soft),
        border-color 0.45s var(--ease-soft),
        transform 0.6s var(--ease-out-expo),
        box-shadow 0.6s var(--ease-out-expo);
}

.btn span[aria-hidden="true"] {
    transition: transform 0.55s var(--ease-out-expo);
}

.btn:hover span[aria-hidden="true"] {
    transform: translateX(5px);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0) scale(0.99);
    transition-duration: 0.12s;
}

.btn--primary {
    background: var(--sage);
    color: var(--sage-ink);
}

.btn--primary:hover {
    background: var(--sage-hover);
    box-shadow: 0 14px 30px -16px rgba(40, 75, 59, 0.45);
}

.btn--ghost {
    border-color: var(--line-strong);
    color: var(--sage-deep);
    background: transparent;
}

.btn--ghost:hover {
    background: #F4F1EA;
}

.btn--block {
    width: 100%;
    padding: 15px 24px;
}

.link-arrow {
    flex-shrink: 0;
    font-size: 14px;
    color: var(--sage-deep);
    transition: color 0.4s var(--ease-soft);
}

.link-arrow span {
    display: inline-block;
    transition: transform 0.55s var(--ease-out-expo);
}

.link-arrow:hover {
    color: var(--sage-ink);
}

.link-arrow:hover span {
    transform: translateX(5px);
}

/* ==========================================================================
   首页 · 全屏主视觉
   ========================================================================== */

.hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: calc(100vh - 81px);
    min-height: calc(100svh - 81px);
    padding: 88px 0 128px;
    overflow: hidden;
}

.hero__backdrop {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.hero__glow {
    position: absolute;
    top: -14%;
    right: -12%;
    width: 60vw;
    height: 60vw;
    max-width: 860px;
    max-height: 860px;
    border-radius: 50%;
    background: radial-gradient(circle at 50% 50%, rgba(168, 213, 186, 0.34), rgba(168, 213, 186, 0) 68%);
    will-change: transform;
}

.hero__arc {
    position: absolute;
    right: -180px;
    bottom: -300px;
    width: 700px;
    height: 700px;
    border: 1px solid rgba(168, 213, 186, 0.45);
    border-radius: 50%;
    will-change: transform;
}

.hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
    gap: 48px;
    align-items: center;
}

.hero__content {
    max-width: 720px;
}

.hero__title {
    margin: 24px 0 0;
    font-size: clamp(42px, 5.4vw, 78px);
    font-weight: 600;
    line-height: 1.16;
    letter-spacing: 0.005em;
}

.hero__line {
    display: block;
    overflow: hidden;
    padding-bottom: 0.06em;
    margin-bottom: -0.06em;
}

.hero__line > span {
    display: block;
    transform: translate3d(0, 112%, 0);
    animation: heroLineUp 1.25s var(--ease-out-expo) forwards;
}

.hero__line:nth-child(1) > span {
    animation-delay: 0.15s;
}

.hero__line:nth-child(2) > span {
    animation-delay: 0.28s;
}

.hero__title-accent {
    color: var(--sage-deep);
}

.hero__lead {
    margin: 28px 0 0;
    font-size: 18px;
    color: var(--muted);
    opacity: 0;
    animation: heroFade 1s var(--ease-out-expo) 0.62s forwards;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 44px;
    opacity: 0;
    animation: heroFade 1s var(--ease-out-expo) 0.76s forwards;
}

.hero__eyebrow {
    opacity: 0;
    animation: heroFade 0.9s var(--ease-out-expo) 0.02s forwards;
}

@keyframes heroLineUp {
    to {
        transform: translate3d(0, 0, 0);
    }
}

@keyframes heroFade {
    from {
        opacity: 0;
        transform: translate3d(0, 16px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

/* 主视觉：层叠信纸 */

.hero__visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    animation: heroVisualIn 1.5s var(--ease-out-expo) 0.35s forwards;
}

.hero__visual-inner {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    will-change: transform;
}

@keyframes heroVisualIn {
    from {
        opacity: 0;
        transform: translate3d(0, 34px, 0) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
    }
}

.hero__orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: -1;
    width: min(520px, 40vw);
    aspect-ratio: 1;
    border: 1px solid rgba(168, 213, 186, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: orbitDrift 14s ease-in-out infinite;
}

@keyframes orbitDrift {
    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -54%) scale(1.02);
    }
}

.letter {
    position: relative;
    width: clamp(250px, 24vw, 350px);
    aspect-ratio: 3 / 4;
    animation: letterFloat 10s ease-in-out infinite;
}

@keyframes letterFloat {
    0%,
    100% {
        transform: translate3d(0, 0, 0);
    }
    50% {
        transform: translate3d(0, -14px, 0);
    }
}

.letter__sheet {
    position: absolute;
    inset: 0;
    border-radius: 20px;
}

.letter__sheet--back {
    background: #F1ECE1;
    border: 1px solid #E4DED1;
    transform: rotate(-9deg) translate3d(-14px, 22px, 0);
}

.letter__sheet--mid {
    background: #FAF6EE;
    border: 1px solid var(--line);
    transform: rotate(5deg) translate3d(16px, 10px, 0);
}

.letter__sheet--front {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 28px;
    background: var(--surface);
    border: 1px solid var(--line);
    transform: rotate(-2deg);
    box-shadow: 0 36px 70px -34px rgba(40, 75, 59, 0.22);
}

.letter__mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    margin-bottom: 30px;
    border-radius: 14px;
    background: var(--sage);
    color: var(--sage-ink);
}

.letter__mark svg {
    width: 22px;
    height: 22px;
}

.letter__kicker {
    font-size: 10px;
    letter-spacing: 0.24em;
    color: var(--muted);
}

.letter__title {
    margin-top: 8px;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.08em;
}

.letter__rule {
    width: 100%;
    height: 1px;
    margin-top: 22px;
    background: var(--line);
}

.letter__rule--short {
    width: 62%;
}

.letter__seal {
    position: absolute;
    right: 24px;
    bottom: 24px;
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--sage);
    color: var(--sage-ink);
    font-size: 18px;
    font-weight: 600;
    box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.45);
}

/* 滚动提示 */

.scroll-cue {
    position: absolute;
    bottom: 30px;
    left: 50%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transform: translateX(-50%);
    color: var(--muted);
    font-size: 10px;
    letter-spacing: 0.22em;
    transition: color 0.4s var(--ease-soft);
}

.scroll-cue:hover {
    color: var(--sage-deep);
}

.scroll-cue__track {
    position: relative;
    display: block;
    width: 1px;
    height: 56px;
    overflow: hidden;
    background: linear-gradient(to bottom, var(--line-strong), transparent);
}

.scroll-cue__dot {
    position: absolute;
    top: -14px;
    left: 50%;
    width: 1px;
    height: 14px;
    background: var(--sage-deep);
    transform: translateX(-50%);
    animation: cueDrop 2.8s var(--ease-out-quart) infinite;
}

@keyframes cueDrop {
    0% {
        opacity: 0;
        transform: translate(-50%, 0);
    }
    18% {
        opacity: 1;
    }
    78% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-50%, 70px);
    }
}

/* ==========================================================================
   首页 · 社团介绍
   ========================================================================== */

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 56px;
}

.value {
    position: relative;
    padding: 32px 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    transition:
        transform 0.7s var(--ease-out-expo),
        border-color 0.5s var(--ease-soft),
        box-shadow 0.7s var(--ease-out-expo);
}

.value:hover {
    transform: translateY(-5px);
    border-color: #CFE3D4;
    box-shadow: 0 24px 48px -30px rgba(40, 75, 59, 0.28);
}

.value__index {
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--muted);
}

.value__title {
    margin: 16px 0 8px;
    font-size: 18px;
    font-weight: 600;
}

.value__text {
    margin: 0;
    font-size: 14.5px;
    line-height: 1.9;
    color: var(--muted);
}

/* ==========================================================================
   公告卡片与列表
   ========================================================================== */

.notice-list {
    display: grid;
    gap: 20px;
}

.notice-list--grid {
    grid-template-columns: repeat(3, 1fr);
}

.notice-card {
    position: relative;
    display: block;
    overflow: hidden;
    padding: 30px 32px 32px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    transition:
        transform 0.7s var(--ease-out-expo),
        border-color 0.5s var(--ease-soft),
        box-shadow 0.7s var(--ease-out-expo);
}

.notice-card::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 2px;
    background: var(--sage);
    transform: scaleY(0);
    transform-origin: 50% 0;
    transition: transform 0.7s var(--ease-out-expo);
}

.notice-card:hover {
    transform: translateY(-4px);
    border-color: #CFE3D4;
    box-shadow: 0 26px 54px -34px rgba(40, 75, 59, 0.3);
}

.notice-card:hover::after {
    transform: scaleY(1);
}

.notice-card__date {
    display: block;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--muted);
}

.notice-card__title {
    margin: 12px 0 8px;
    font-size: 21px;
    font-weight: 600;
    line-height: 1.5;
}

.notice-card__summary {
    margin: 0;
    font-size: 15.5px;
    line-height: 1.85;
    color: var(--muted);
}

.notice-card__more {
    display: inline-flex;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--sage-deep);
}

.notice-card__more span {
    display: inline-block;
    transition: transform 0.55s var(--ease-out-expo);
}

.notice-card:hover .notice-card__more span {
    transform: translateX(5px);
}

.empty-state {
    padding: 64px 0;
    text-align: center;
    color: var(--muted);
}

/* ==========================================================================
   分页
   ========================================================================== */

.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 56px;
}

.pagination__link {
    font-size: 14px;
    color: var(--sage-deep);
    transition: color 0.4s var(--ease-soft);
}

.pagination__link.is-disabled {
    color: var(--line-strong);
}

.pagination__numbers {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pagination__number {
    display: grid;
    place-items: center;
    min-width: 40px;
    height: 40px;
    border-radius: 12px;
    font-size: 14px;
    color: var(--text-soft);
    transition:
        background 0.45s var(--ease-soft),
        color 0.45s var(--ease-soft),
        transform 0.55s var(--ease-out-expo);
}

a.pagination__number:hover {
    background: var(--surface-soft);
    transform: translateY(-2px);
}

.pagination__number.is-current {
    background: var(--sage);
    color: var(--sage-ink);
    font-weight: 600;
}

.pagination__ellipsis {
    padding: 0 8px;
    color: var(--muted);
}

/* ==========================================================================
   页面标题
   ========================================================================== */

.page-head {
    position: relative;
    padding: 128px 0 0;
}

.page-title {
    margin: 14px 0 0;
    font-size: clamp(34px, 5vw, 60px);
    font-weight: 600;
    line-height: 1.28;
    letter-spacing: 0.005em;
}

.page-lead {
    max-width: 680px;
    margin: 20px 0 0;
    color: var(--muted);
    font-size: 17px;
}

/* ==========================================================================
   公告详情
   ========================================================================== */

.notice-detail {
    padding: 104px 0 128px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--muted);
    transition: color 0.4s var(--ease-soft);
}

.back-link span {
    transition: transform 0.55s var(--ease-out-expo);
}

.back-link:hover {
    color: var(--sage-deep);
}

.back-link:hover span {
    transform: translateX(-4px);
}

.notice-detail__date {
    margin: 44px 0 0;
    font-size: 13px;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.notice-detail__title {
    margin: 14px 0 0;
    font-size: clamp(32px, 4.6vw, 56px);
    font-weight: 600;
    line-height: 1.32;
    letter-spacing: 0.005em;
}

.notice-detail__summary {
    margin: 22px 0 0;
    padding-bottom: 36px;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 17px;
}

.notice-detail__body {
    margin-top: 40px;
    font-size: 17px;
    line-height: 2.05;
    color: var(--text);
}

.notice-detail__body p {
    margin: 0 0 24px;
}

.notice-detail__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 64px;
    padding-top: 36px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 14px;
}

.notice-detail__footer p {
    margin: 0;
}

/* ==========================================================================
   反馈入口卡片
   ========================================================================== */

.cta-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    overflow: hidden;
    padding: 56px 60px;
    border-radius: var(--radius-lg);
    background: var(--surface-soft);
}

.cta-card__text .prose {
    margin-top: 14px;
}

.cta-card__action {
    flex-shrink: 0;
}

/* ==========================================================================
   反馈表单
   ========================================================================== */

.form-card {
    max-width: var(--narrow);
    padding: 48px 52px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface);
}

.form {
    display: grid;
    gap: 32px;
}

.field {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    border: 0;
    min-width: 0;
}

.field__label {
    padding: 0;
    font-size: 14px;
    font-weight: 600;
}

.field__required,
.field__optional {
    margin-left: 8px;
    font-size: 11px;
    font-weight: 400;
    color: var(--muted);
}

.field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.choice-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.choice {
    position: relative;
}

.choice input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.choice__label {
    display: inline-flex;
    padding: 10px 20px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    font-size: 14px;
    color: var(--text-soft);
    cursor: pointer;
    transition:
        background 0.45s var(--ease-soft),
        border-color 0.45s var(--ease-soft),
        color 0.45s var(--ease-soft),
        transform 0.55s var(--ease-spring);
}

.choice__label:hover {
    background: #F7F4EE;
    transform: translateY(-1px);
}

.choice input:checked + .choice__label {
    border-color: var(--sage);
    background: var(--surface-soft);
    color: var(--sage-ink);
    font-weight: 500;
    transform: translateY(-1px);
}

.choice input:focus-visible + .choice__label {
    outline: 2px solid var(--sage-deep);
    outline-offset: 3px;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.75;
    transition:
        border-color 0.45s var(--ease-soft),
        box-shadow 0.45s var(--ease-soft),
        background 0.45s var(--ease-soft);
}

textarea {
    min-height: 180px;
    resize: vertical;
}

input[type="text"]::placeholder,
textarea::placeholder {
    color: #B4B0A8;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--sage-deep);
    background: var(--surface);
    box-shadow: 0 0 0 4px rgba(168, 213, 186, 0.26);
}

.field__hint,
.form-note {
    margin: 0;
    font-size: 13px;
    line-height: 1.75;
    color: var(--muted);
}

.form-note--preview {
    color: var(--sage-deep);
}

/* ==========================================================================
   404
   ========================================================================== */

.error-page {
    padding: 168px 0 200px;
}

.error-page__code {
    margin: 0;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: var(--sage-deep);
}

.error-page__title {
    margin: 16px 0 0;
    font-size: clamp(34px, 5vw, 60px);
    font-weight: 600;
    line-height: 1.3;
}

.error-page__text {
    margin: 18px 0 0;
    color: var(--muted);
    font-size: 17px;
}

.error-page__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 40px;
}

/* ==========================================================================
   页脚
   ========================================================================== */

.site-footer {
    margin-top: 48px;
    border-top: 1px solid var(--line);
}

.site-footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 56px 0;
    text-align: center;
}

.site-footer__brand {
    margin: 0;
    font-size: 14px;
    color: var(--text-soft);
}

.site-footer__nav {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--muted);
}

.site-footer__nav a {
    transition: color 0.4s var(--ease-soft);
}

.site-footer__nav a:hover {
    color: var(--sage-deep);
}

.site-footer__copy {
    margin: 0;
    font-size: 12px;
    color: var(--muted);
}

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 1080px) {
    .hero {
        padding: 72px 0 112px;
    }

    .hero__inner {
        grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
        gap: 40px;
    }

    .letter {
        width: clamp(230px, 26vw, 300px);
    }

    .notice-list--grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .hero {
        min-height: calc(100vh - 63px);
        min-height: calc(100svh - 63px);
        padding: 48px 0 112px;
    }

    .hero__inner {
        grid-template-columns: 1fr;
    }

    .hero__content {
        max-width: none;
    }

    .hero__visual {
        display: none;
    }

    .hero__arc {
        opacity: 0.6;
    }

    .notice-list--grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 104px 0;
    }

    .value-grid {
        margin-top: 44px;
    }
}

@media (max-width: 720px) {
    .container {
        width: min(100% - 44px, var(--container));
    }

    .site-header__inner {
        padding: 14px 0;
        gap: 12px;
    }

    .brand {
        gap: 10px;
    }

    .brand__mark {
        width: 34px;
        height: 34px;
        border-radius: 11px;
    }

    .brand__name {
        font-size: 15px;
    }

    .brand__sub {
        font-size: 11px;
    }

    .site-nav__link {
        padding: 7px 10px;
        font-size: 13px;
    }

    .site-nav__link::after {
        right: 10px;
        left: 10px;
    }

    .hero {
        padding: 40px 0 104px;
    }

    .hero__title {
        font-size: clamp(34px, 9.4vw, 46px);
    }

    .hero__lead {
        margin-top: 22px;
        font-size: 16px;
    }

    .hero__actions {
        margin-top: 32px;
    }

    .scroll-cue {
        bottom: 22px;
    }

    .section {
        padding: 88px 0;
    }

    .section__watermark {
        display: none;
    }

    .section__head {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
        margin-bottom: 32px;
    }

    .value-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .value {
        padding: 26px 24px;
    }

    .notice-card {
        padding: 26px 24px;
    }

    .page-head {
        padding: 88px 0 0;
    }

    .page-lead {
        font-size: 16px;
    }

    .notice-detail {
        padding: 72px 0 96px;
    }

    .notice-detail__footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .cta-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 28px;
        padding: 36px 28px;
    }

    .form-card {
        padding: 30px 24px;
    }

    .field-grid {
        grid-template-columns: 1fr;
    }

    .pagination {
        justify-content: center;
        margin-top: 40px;
    }

    .pagination__link {
        display: none;
    }

    .error-page {
        padding: 112px 0 140px;
    }
}

@media (max-width: 900px) and (max-height: 700px) {
    .scroll-cue {
        display: none;
    }
}

/* ==========================================================================
   减弱动态效果
   ========================================================================== */

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

    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }

    .js [data-reveal] {
        opacity: 1;
        transform: none;
    }

    .hero__line > span,
    .hero__lead,
    .hero__actions,
    .hero__eyebrow,
    .hero__visual {
        opacity: 1;
        transform: none;
    }
}