@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  color-scheme: light;
  --ink: #28323a;
  --muted: #747e88;
  --faint: #8b949d;
  --link: #2f6fb5;
  --link-hover: #285f9a;
  --cloud: #f4f5f7;
  --surface: #ffffff;
  --input: #fafbfc;
  --line: #e3e7eb;
  --line-strong: #d3dbe3;
  --soft-blue: #eef5fc;
  --error: #bc4e4e;
  --shadow: 0 12px 44px #233b5210, 0 1px 4px #233b5203;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --ink: #dce5ef;
  --muted: #a9b6c5;
  --faint: #92a2b5;
  --link: #87b9f3;
  --link-hover: #a1caff;
  --cloud: #111820;
  --surface: #19232e;
  --input: #151e28;
  --line: #2b3948;
  --line-strong: #425367;
  --soft-blue: #22374e;
  --error: #f49797;
  --shadow: 0 12px 44px #00000020;
}
* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--cloud); background-image: radial-gradient(ellipse at 70% 15%, #ffffff80, transparent 58%); color: var(--ink); font: 14px/1.7 'Manrope', 'PingFang SC', 'Microsoft YaHei', sans-serif; -webkit-font-smoothing: antialiased; }
[data-theme="dark"] body { background-image: radial-gradient(ellipse at 70% 15%, #22334750, transparent 58%); }
button, input { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; color: inherit; }
a { color: var(--link); text-decoration: none; }
button, a, input, .dropzone { transition: background-color .2s, border-color .2s, color .2s, box-shadow .2s, transform .2s; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }
[hidden] { display: none !important; }
.svg-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 20px; height: 20px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -80px; left: 20px; z-index: 10; padding: 10px 18px; background: var(--surface); border-radius: 8px; }
.skip-link:focus { top: 16px; }
.site-header { max-width: 1280px; height: 92px; margin: 0 auto; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
.wordmark { font-size: 26px; font-weight: 800; letter-spacing: -1.5px; color: var(--ink); line-height: 1; }
.brand-slash { color: var(--link); margin-left: 7px; font-weight: 500; }
.header-section { display: flex; align-items: center; gap: 22px; margin-left: 26px; color: var(--muted); font-size: 12px; letter-spacing: 1px; }
.header-divider { width: 1px; height: 17px; background: var(--line-strong); }
.header-actions { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.icon-button { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; padding: 0; border: 0; border-radius: 8px; background: transparent; color: var(--muted); }
.icon-button:hover { color: var(--link); background: var(--soft-blue); }
.theme-toggle .icon { width: 18px; height: 18px; }
.sun-icon, [data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: block; }
.action-divider { width: 1px; height: 14px; background: var(--line-strong); }
.home-link { display: flex; gap: 10px; align-items: center; font-size: 12px; color: var(--muted); }
.home-link .icon { width: 15px; height: 15px; }
.home-link:hover { color: var(--link); }
.page-layout { max-width: 1112px; margin: 64px auto 70px; display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 88px; align-items: start; }
.introduction { padding-top: 18px; }
.eyebrow { color: var(--muted); font-size: 9px; font-weight: 600; letter-spacing: 2px; display: flex; align-items: center; gap: 10px; }
.status-dot { width: 5px; height: 5px; border-radius: 50%; background: #7aa8ad; box-shadow: 0 0 0 4px #7aa8ad15; }
h1 { font-size: 44px; font-weight: 600; line-height: 1.5; letter-spacing: 1px; margin: 24px 0 17px; }
.title-accent { color: var(--link); }
.intro-copy { font-size: 13px; line-height: 2.15; color: var(--muted); margin: 0; letter-spacing: .5px; }
.mountain-card { position: relative; margin: 38px 0 0; width: 100%; height: 294px; overflow: hidden; border-radius: 12px; background: #c4d0df; isolation: isolate; }
.mountain-card img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: 43% 58%; transition: transform 1s ease; }
.mountain-card:hover img { transform: scale(1.035); }
.mountain-wash { position: absolute; inset: 0; background: linear-gradient(180deg, #283b4910 25%, #172f49a8 100%); }
.photo-index { position: absolute; top: 19px; left: 21px; color: #fff; font-size: 8px; letter-spacing: 1.3px; text-shadow: 0 1px 6px #0003; }
.mountain-card figcaption { position: absolute; left: 23px; bottom: 24px; color: #fff; }
.mountain-card figcaption > span { font-size: 16px; letter-spacing: 2px; }
.mountain-card small { display: block; font-size: 7px; letter-spacing: 1.5px; margin-top: 8px; opacity: .75; }
[data-theme="dark"] .mountain-card img { filter: saturate(.45) brightness(.72); }
.side-caption { display: flex; gap: 11px; align-items: center; margin-top: 23px; color: var(--faint); font-size: 10px; letter-spacing: .6px; }
.caption-line { width: 20px; height: 1px; background: var(--line-strong); }
.form-panel { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 30px 36px 25px; box-shadow: var(--shadow); }
.form-heading { display: flex; justify-content: space-between; align-items: center; padding-bottom: 23px; margin-bottom: 25px; border-bottom: 1px solid var(--line); }
.small-heading { color: var(--faint); font-size: 8px; font-weight: 600; letter-spacing: 1.8px; }
h2 { font-size: 23px; font-weight: 600; letter-spacing: .5px; line-height: 1.45; margin: 6px 0 0; }
.required-note { font-size: 10px; color: var(--muted); align-self: flex-end; margin-bottom: 4px; }
.required-note > span { color: var(--link); margin-right: 3px; }
.field { margin-bottom: 21px; min-width: 0; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
label { display: block; font-size: 12px; font-weight: 600; letter-spacing: .3px; margin-bottom: 9px; }
.required { color: var(--link); font-size: 12px; margin-left: 3px; }
input:not([type="file"]) { display: block; width: 100%; min-width: 0; height: 45px; padding: 0 14px; border: 1px solid var(--line); border-radius: 7px; background: var(--input); color: var(--ink); font-size: 12px; outline: none; }
input::placeholder { color: var(--faint); opacity: .9; }
input:not([type="file"]):hover { border-color: var(--line-strong); }
input:not([type="file"]):focus { background: var(--surface); border-color: var(--link); box-shadow: 0 0 0 3px color-mix(in srgb, var(--link) 11%, transparent); }
input[aria-invalid="true"]:not([type="file"]) { border-color: var(--error); }
.password-wrap { position: relative; }
.password-wrap input { padding-right: 43px; }
.password-toggle { position: absolute; top: 5px; right: 4px; width: 35px; height: 35px; }
.password-toggle .icon { width: 17px; height: 17px; }
.label-row { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.character-count { color: var(--faint); font: 9px/1.5 var(--mono); }
.field-meta { color: var(--faint); font-size: 10px; }
.tag-input-wrap { position: relative; }
.tag-input-wrap input { padding-left: 34px; }
.hash { position: absolute; left: 14px; top: 10px; font-size: 15px; color: var(--faint); pointer-events: none; }
.tag-suggestions { display: flex; gap: 12px; align-items: center; margin-top: 11px; }
.tag-suggestions > span { color: var(--faint); font-size: 10px; flex: 0 0 auto; }
.tag-options { display: flex; gap: 7px; flex-wrap: wrap; }
.tag-options button { border: 1px solid var(--line); border-radius: 4px; background: transparent; padding: 2px 9px; color: var(--muted); font-size: 10px; line-height: 1.6; }
.tag-options button::before { content: '#'; opacity: .55; margin-right: 3px; }
.tag-options button:hover, .tag-options button[aria-pressed="true"] { color: var(--link); background: var(--soft-blue); border-color: color-mix(in srgb, var(--link) 30%, var(--line)); }
.tags-field { margin-bottom: 24px; }
.upload-field { margin-bottom: 0; }
.dropzone { position: relative; border: 1px dashed #c7d4e0; border-radius: 9px; background: color-mix(in srgb, var(--soft-blue) 30%, var(--surface)); min-height: 155px; display: flex; align-items: center; justify-content: center; }
.dropzone:hover, .dropzone:focus-within, .dropzone.is-dragging { border-color: var(--link); background: var(--soft-blue); }
.dropzone:focus-within { outline: 2px solid var(--link); outline-offset: 3px; }
.dropzone.is-dragging { box-shadow: inset 0 0 0 1px var(--link); }
.dropzone.has-error { border-color: var(--error); }
.file-input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; z-index: 1; }
.dropzone-content { display: flex; flex-direction: column; align-items: center; pointer-events: none; padding: 20px 12px; }
.upload-icon { color: var(--link); margin-bottom: 12px; display: flex; align-items: center; justify-content: center; }
.upload-icon .icon { width: 27px; height: 27px; stroke-width: 1.3; }
.dropzone-title { font-size: 12px; font-weight: 500; letter-spacing: .4px; }
.dropzone-subtitle { margin-top: 3px; color: var(--faint); font-size: 11px; }
.browse-link { color: var(--link); margin-left: 3px; }
.upload-help { color: var(--faint); font-size: 10px; margin: 9px 0 0; line-height: 1.8; }
.selected-file { display: flex; align-items: center; gap: 12px; padding: 14px; border: 1px solid color-mix(in srgb, var(--link) 25%, var(--line)); border-radius: 9px; min-height: 85px; background: var(--soft-blue); }
.file-icon { display: flex; align-items: center; justify-content: center; width: 39px; height: 45px; color: var(--link); flex: 0 0 auto; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; }
.file-icon .icon { width: 21px; height: 21px; }
.file-details { min-width: 0; flex: 1; }
.file-details strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12px; font-weight: 500; }
.file-details > span { font-size: 10px; color: var(--muted); }
.file-ready { display: flex; color: var(--link); }
.file-ready .icon { width: 16px; height: 16px; }
.remove-file { width: 28px; height: 28px; }
.remove-file .icon { width: 16px; height: 16px; }
.field-error { margin: 6px 0 0; color: var(--error); font-size: 11px; line-height: 1.6; }
.form-bottom { padding-top: 23px; margin-top: 23px; border-top: 1px solid var(--line); }
.submit-button { display: flex; align-items: center; justify-content: center; position: relative; width: 100%; border: 1px solid transparent; border-radius: 7px; height: 46px; color: #fff; background: #2f6fb5; font-size: 12px; font-weight: 500; letter-spacing: 2px; }
.submit-button > .icon { position: absolute; right: 18px; width: 17px; height: 17px; }
.submit-button:hover { background: #285f9a; box-shadow: 0 5px 14px #2f6fb523; }
.submit-button:active { transform: translateY(1px); }
[data-theme="dark"] .submit-button { background: #3478c2; }
[data-theme="dark"] .submit-button:hover { background: #4287d1; }
.submission-note { color: var(--faint); font-size: 10px; display: flex; align-items: center; justify-content: center; gap: 5px; margin: 12px 0 0; }
.submission-note > .icon { width: 11px; height: 11px; stroke-width: 1.5; }
.form-message { color: var(--error); font-size: 11px; margin: 10px 0 0; text-align: center; }
.site-footer { max-width: 1280px; margin: 0 auto; padding: 21px 0 25px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; color: var(--faint); font-size: 10px; }
.footer-motto { letter-spacing: 1px; }
.footer-label { font-size: 8px; letter-spacing: 1.5px; }
.footer-label > span { margin-left: 10px; font-size: 13px; }
dialog { color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 18px; width: min(420px, calc(100% - 40px)); padding: 40px 26px 28px; text-align: center; box-shadow: 0 24px 90px #14283f30; }
dialog::backdrop { background: #16263766; backdrop-filter: blur(5px); }
.dialog-close { position: absolute; top: 10px; right: 10px; }
.dialog-check { display: flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: 50%; background: var(--soft-blue); color: var(--link); margin: 0 auto 22px; }
.dialog-check .icon { width: 27px; height: 27px; }
dialog h2 { font-size: 23px; margin-top: 9px; }
dialog p { color: var(--muted); font-size: 12px; line-height: 1.9; margin: 15px 0 24px; }
.dialog-button { display: inline-flex; align-items: center; gap: 35px; border: 0; background: var(--soft-blue); color: var(--link); padding: 11px 20px; font-size: 12px; border-radius: 7px; }
.dialog-button:hover { background: color-mix(in srgb, var(--link) 18%, var(--surface)); }
.dialog-button > .icon { width: 16px; height: 16px; }
@media (min-width: 1500px) { .page-layout { margin-top: 76px; margin-bottom: 82px; } }
@media (max-width: 1390px) { .site-header, .site-footer { margin-left: 48px; margin-right: 48px; } }
@media (max-width: 1180px) { .page-layout { margin: 48px 64px 58px; grid-template-columns: minmax(240px, .85fr) minmax(0, 1.6fr); gap: 52px; } h1 { font-size: 39px; } .form-panel { padding-left: 28px; padding-right: 28px; } .mountain-card { height: 280px; } }
@media (max-width: 950px) { .page-layout { margin-left: 40px; margin-right: 40px; gap: 32px; grid-template-columns: minmax(215px, .8fr) minmax(0, 1.6fr); } .site-header, .site-footer { margin-left: 32px; margin-right: 32px; } h1 { font-size: 34px; } .eyebrow { font-size: 8px; letter-spacing: 1.3px; } .form-panel { padding-left: 24px; padding-right: 24px; } .field-row { gap: 14px; } .mountain-card { height: 268px; } .mountain-card figcaption { left: 18px; } .mountain-card figcaption > span { font-size: 13px; letter-spacing: 1px; } .mountain-card small { font-size: 6px; letter-spacing: 1px; } }
@media (max-width: 760px) { .site-header { height: 75px; margin: 0 24px; } .wordmark { font-size: 24px; } .header-section { gap: 16px; margin-left: 18px; font-size: 11px; } .header-actions { gap: 14px; } .home-link { font-size: 11px; gap: 6px; } .page-layout { max-width: 560px; margin: 36px auto 42px; padding: 0 24px; display: block; } .introduction { padding-top: 0; margin-bottom: 30px; } .eyebrow { font-size: 8px; letter-spacing: 1.6px; } h1 { font-size: 31px; margin: 16px 0 12px; line-height: 1.55; } h1 br { display: none; } .intro-copy { font-size: 12px; line-height: 1.9; } .intro-copy br { display: none; } .mountain-card, .side-caption { display: none; } .form-panel { padding: 26px 25px 23px; border-radius: 14px; } .form-heading { padding-bottom: 20px; margin-bottom: 23px; } h2 { font-size: 22px; } .site-footer { margin: 0 24px; padding: 20px 0; } .footer-label { display: none; } }
@media (max-width: 440px) { .site-header { margin: 0 20px; height: 70px; } .header-section { margin-left: 15px; gap: 13px; } .header-actions { gap: 8px; } .action-divider { display: none; } .home-link { font-size: 0; gap: 0; padding: 8px 2px; } .home-link .icon { width: 17px; height: 17px; } .page-layout { padding: 0 18px; margin-top: 29px; } h1 { font-size: 28px; letter-spacing: .4px; } .introduction { padding-left: 4px; margin-bottom: 25px; } .form-panel { padding: 24px 20px 20px; } .field-row { grid-template-columns: 1fr; gap: 0; } input:not([type="file"]) { height: 46px; font-size: 16px; } input::placeholder { font-size: 12px; } .password-toggle { top: 5px; } .tag-input-wrap .hash { top: 11px; } .tag-suggestions { gap: 9px; } .tag-options { gap: 6px; } .tag-options button { padding: 3px 8px; } .dropzone { min-height: 150px; } .site-footer { margin: 0 22px; font-size: 9px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }

/* ---------------------------------------------------------------- 投稿须知 + @ 评论 */
.license-notice { margin: 26px 0 0; padding: 16px 17px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); font-size: 11px; line-height: 1.95; color: var(--muted); box-shadow: var(--shadow); }
.license-title { margin: 0 0 7px; color: var(--ink); font-weight: 700; font-size: 11px; letter-spacing: .6px; }
.license-notice p { margin: 0 0 8px; }
.license-notice p:last-child { margin-bottom: 0; }
.license-rules { margin: 0 0 9px; padding-left: 15px; }
.license-rules li { margin: 2px 0; }
.license-rules b { color: var(--ink); font-weight: 600; }
.license-foot { color: var(--faint); font-size: 10px; }
.license-notice code, .upload-help code { font-family: var(--mono); font-size: .93em; background: var(--soft-blue); color: var(--link); padding: 1px 4px; border-radius: 3px; }
.optional { margin-left: 7px; color: var(--faint); font-size: 10px; font-weight: 400; }
.at-hint { margin: 8px 0 0; font-size: 10px; line-height: 1.7; color: var(--faint); }
.at-menu { margin-top: 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); box-shadow: 0 14px 40px #233b5214; max-height: 286px; overflow: auto; }
.at-menu button { display: flex; flex-direction: column; gap: 2px; width: 100%; padding: 9px 12px; border: 0; border-bottom: 1px solid var(--line); background: transparent; text-align: left; }
.at-menu button:last-child { border-bottom: 0; }
.at-menu button:hover, .at-menu button.is-active { background: var(--soft-blue); }
.at-title { font-size: 12px; color: var(--ink); }
.at-meta { font-family: var(--mono); font-size: 9.5px; color: var(--faint); }
.at-empty { margin: 0; padding: 11px 12px; font-size: 11px; color: var(--faint); }
@media (max-width: 760px) { .license-notice { margin-top: 18px; padding: 14px 15px 12px; } }