/* S28 数据备份: self-contained presentation layer. */
.s28-backup-cn {
	--s28-bg: #050c12;
	--s28-bg-alt: #091824;
	--s28-surface: #102431;
	--s28-surface-light: #163342;
	--s28-text: #edf4f6;
	--s28-muted: #aebfc7;
	--s28-faint: #78909b;
	--s28-accent: #73d8e7;
	--s28-accent-deep: #09232d;
	--s28-line: rgba(158, 206, 218, .23);
	background: var(--s28-bg);
	color: var(--s28-text);
	font-family: inherit;
	font-size: 16px;
	line-height: 1.7;
	overflow: clip;
}
.s28-backup-cn *, .s28-backup-cn *::before, .s28-backup-cn *::after { box-sizing: border-box; }
.s28-backup-cn img { display: block; max-width: 100%; height: auto; }
.s28-backup-cn a { color: inherit; }
.s28-shell { width: min(1280px, calc(100% - 160px)); margin-inline: auto; }
.s28-eyebrow { margin: 0 0 17px; color: var(--s28-accent); font-size: 11px; font-weight: 700; letter-spacing: .16em; line-height: 1.4; text-transform: uppercase; }
.s28-hero { position: relative; min-height: 100svh; isolation: isolate; background: #050a0e; }
.s28-hero-media { position: absolute; inset: 0; z-index: -2; margin: 0; overflow: hidden; }
.s28-hero-media::after { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5, 12, 18, .97) 0%, rgba(5, 12, 18, .80) 40%, rgba(5, 12, 18, .26) 76%, rgba(5, 12, 18, .56) 100%), linear-gradient(0deg, rgba(5, 12, 18, .86) 0%, transparent 55%); content: ''; }
.s28-hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 58% center; filter: saturate(.7) contrast(1.05); }
.s28-hero-inner { display: flex; min-height: 100svh; align-items: flex-end; padding-bottom: clamp(72px, 11vh, 132px); }
.s28-hero-copy { width: min(760px, 100%); }
.s28-hero h1 { margin: 0; color: var(--s28-text); font-size: clamp(54px, 7vw, 104px); font-weight: 600; letter-spacing: -.055em; line-height: .98; }
.s28-hero-lead { max-width: 760px; margin: 25px 0 0; color: #f5fbfc; font-size: clamp(19px, 1.8vw, 24px); font-weight: 400; letter-spacing: -.015em; line-height: 1.45; }
.s28-hero-summary { max-width: 600px; margin: 17px 0 0; color: var(--s28-muted); font-size: 17px; line-height: 1.75; }
.s28-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.s28-button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 11px 18px; border: 1px solid transparent; border-radius: 5px; font-size: 14px; font-weight: 700; line-height: 1.2; text-decoration: none; transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease; }
.s28-button:hover { transform: translateY(-2px); }
.s28-button:focus-visible, .s28-motion-toggle:focus-visible, .s28-faq-list summary:focus-visible { outline: 2px solid var(--s28-accent); outline-offset: 4px; }
.s28-backup-cn .s28-button.s28-button--primary { background: var(--s28-accent); color: var(--s28-accent-deep) !important; }
.s28-button--primary:hover { background: #a0edf5; }
.s28-button--quiet { border-color: rgba(227, 246, 249, .42); color: var(--s28-text); }
.s28-button--quiet:hover { border-color: var(--s28-accent); color: var(--s28-accent); }
.s28-hero-meta { display: flex; flex-wrap: wrap; gap: 9px 24px; margin: 20px 0 0 !important; padding: 0; color: #bed0d6; font-size: 11px; letter-spacing: .12em; list-style: none; }
.s28-hero-meta li { position: relative; }
.s28-hero-meta li + li::before { position: absolute; top: 50%; left: -14px; width: 3px; height: 3px; border-radius: 50%; background: var(--s28-accent); content: ''; transform: translateY(-50%); }
.s28-section { padding: 64px 0; background: var(--s28-bg); }
.s28-section--why, .s28-section--services, .s28-section--delivery { background: var(--s28-bg-alt); }
.s28-section--architecture { background: var(--s28-bg); }
.s28-section-head { display: grid; gap: 48px; }
.s28-section-head--split { grid-template-columns: minmax(300px, .84fr) minmax(0, 1.16fr); align-items: start; }
.s28-section-head h2, .s28-capability-copy h2, .s28-faq-layout h2, .s28-cta h2 { max-width: 560px; margin: 0; color: var(--s28-text); font-size: clamp(32px, 4vw, 56px); font-weight: 600; letter-spacing: -.045em; line-height: 1.08; }
.s28-section-intro { max-width: 660px; color: var(--s28-muted); font-size: 17px; }
.s28-section-intro p { margin: 0; }
.s28-section-intro p + p { margin-top: 18px; }
.s28-section-intro a { color: var(--s28-accent); text-underline-offset: 4px; }
.s28-boundary-note { color: #d2e4e8; }
.s28-risk-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 52px; border-top: 1px solid var(--s28-line); }
.s28-risk-item { display: grid; grid-template-columns: 31px 1fr; gap: 15px; min-height: 188px; padding: 26px 22px 10px 0; border-bottom: 1px solid var(--s28-line); }
.s28-risk-item + .s28-risk-item { padding-left: 22px; border-left: 1px solid var(--s28-line); }
.s28-risk-item > span, .s28-service-row > span, .s28-delivery-list li > span { color: var(--s28-accent); font: 700 11px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.s28-risk-item h3 { margin: 0; font-size: 18px; font-weight: 600; }
.s28-risk-item p { margin: 10px 0 0; color: var(--s28-muted); font-size: 14px; line-height: 1.65; }
.s28-diagram { position: relative; margin-top: 44px; padding: 23px 26px 21px; border: 1px solid var(--s28-line); border-radius: 7px; background: linear-gradient(135deg, rgba(21, 50, 64, .9), rgba(7, 20, 29, .96)); }
.s28-diagram-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-bottom: 22px; border-bottom: 1px solid var(--s28-line); }
.s28-diagram-toolbar > div { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px; }
.s28-diagram-kicker { color: var(--s28-accent); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; }
.s28-diagram-toolbar strong { font-size: 15px; font-weight: 600; }
.s28-motion-toggle { min-height: 36px; padding: 7px 12px; border: 1px solid rgba(196, 226, 232, .4); border-radius: 4px; background: transparent; color: var(--s28-text); cursor: pointer; font: inherit; font-size: 12px; }
.s28-motion-toggle:hover { border-color: var(--s28-accent); color: var(--s28-accent); }
.s28-flow { position: relative; display: grid; grid-template-columns: 1.05fr 1.1fr 1.58fr 1.05fr; align-items: center; gap: 29px; min-height: 292px; padding: 38px 5px 24px; }
.s28-flow-lines { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; color: var(--s28-accent); pointer-events: none; }
.s28-flow-lines path { fill: none; stroke: currentColor; stroke-dasharray: 9 8; stroke-linecap: round; stroke-width: 2; marker-end: url(#s28-arrow); opacity: .76; }
.s28-flow-lines path[data-s28-path] { animation: s28-dash 8.4s linear infinite; }
@keyframes s28-dash { to { stroke-dashoffset: -170; } }
.s28-flow-node, .s28-copy-group { position: relative; z-index: 1; }
.s28-flow-node { padding: 20px 18px; border: 1px solid rgba(169, 220, 230, .32); border-radius: 5px; background: rgba(12, 35, 47, .93); }
.s28-flow-node h3 { margin: 5px 0 0; color: var(--s28-text); font-size: 16px; font-weight: 600; line-height: 1.35; }
.s28-flow-node p { margin: 9px 0 0; color: var(--s28-muted); font-size: 12px; line-height: 1.65; }
.s28-node-index { color: var(--s28-accent); font: 700 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.s28-copy-group { padding: 13px; border: 1px dashed rgba(169, 220, 230, .38); border-radius: 5px; background: rgba(9, 26, 36, .55); }
.s28-group-label { display: block; margin: 0 0 10px 2px; color: var(--s28-accent); font-size: 11px; letter-spacing: .05em; }
.s28-copy-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.s28-flow-node--copy { min-height: 124px; padding: 15px 13px; }
.s28-flow-node--copy h3 { font-size: 13px; }
.s28-flow-node--copy p { font-size: 11px; }
.s28-diagram-caption { margin: 0; padding-top: 17px; border-top: 1px solid var(--s28-line); color: var(--s28-faint); font-size: 12px; line-height: 1.65; }
.s28-architecture-figure { margin: 12px 0 0; }
.s28-service-table { margin-top: 47px; border-top: 1px solid var(--s28-line); }
.s28-service-row { display: grid; grid-template-columns: 44px minmax(210px, .55fr) minmax(0, 1fr); align-items: start; gap: 20px; padding: 19px 0; border-bottom: 1px solid var(--s28-line); }
.s28-service-row strong { font-size: 17px; font-weight: 600; }
.s28-service-row p { margin: 0; color: var(--s28-muted); font-size: 15px; line-height: 1.6; }
.s28-capability-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: clamp(44px, 8vw, 112px); }
.s28-capability-copy > p:not(.s28-eyebrow) { margin: 23px 0 0; color: var(--s28-muted); font-size: 17px; }
.s28-scenario-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 26px; margin: 30px 0 0; padding: 0; border-top: 1px solid var(--s28-line); list-style: none; }
.s28-scenario-list li { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 13px 0; border-bottom: 1px solid var(--s28-line); }
.s28-scenario-list span { font-size: 14px; font-weight: 600; }
.s28-scenario-list small { color: var(--s28-faint); font-size: 11px; text-align: right; }
.s28-concept-figure { margin: 0; }
.s28-image-frame { overflow: hidden; border: 1px solid var(--s28-line); border-radius: 5px; background: #f2f8fc; }
.s28-image-frame a { display: block; }
.s28-image-frame img { width: 100%; height: auto !important; object-fit: contain; }
.s28-concept-figure figcaption { margin-top: 12px; color: var(--s28-faint); font-size: 12px; line-height: 1.65; }
.s28-concept-figure.s28-architecture-figure { margin: 12px 0 0; }
.s28-field-figure { margin: 0; }
.s28-field-figure .s28-image-frame { background: #0a151d; }
.s28-field-figure img { width: 100%; height: auto !important; object-fit: contain; }
.s28-field-figure figcaption { margin-top: 12px; color: var(--s28-faint); font-size: 12px; line-height: 1.65; }
.s28-delivery-layout { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(240px, .7fr); align-items: start; gap: 54px; margin-top: 46px; }
.s28-delivery-list { margin: 0; padding: 0; border-top: 1px solid var(--s28-line); list-style: none; }
.s28-delivery-list li { display: grid; grid-template-columns: 35px minmax(200px, .65fr) minmax(0, 1.2fr); align-items: baseline; gap: 16px; padding: 19px 0; border-bottom: 1px solid var(--s28-line); }
.s28-delivery-list strong { font-size: 17px; font-weight: 600; }
.s28-delivery-list p { margin: 0; color: var(--s28-muted); font-size: 14px; }
.s28-delivery-aside { padding: 26px; border: 1px solid var(--s28-line); border-radius: 5px; background: rgba(17, 47, 60, .55); }
.s28-aside-mark { color: var(--s28-accent); font-size: 25px; }
.s28-delivery-aside h3 { margin: 28px 0 8px; font-size: 21px; font-weight: 600; }
.s28-delivery-aside p { margin: 0; color: var(--s28-muted); font-size: 14px; }
.s28-section--faq { background: #07131d; }
.s28-faq-layout { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: 80px; }
.s28-faq-list { border-top: 1px solid var(--s28-line); }
.s28-faq-list details { border-bottom: 1px solid var(--s28-line); }
.s28-faq-list summary { position: relative; padding: 19px 38px 19px 0; color: var(--s28-text); cursor: pointer; font-size: 17px; font-weight: 600; list-style: none; }
.s28-faq-list summary::-webkit-details-marker { display: none; }
.s28-faq-list summary::after { position: absolute; top: 20px; right: 4px; color: var(--s28-accent); content: '+'; font-size: 22px; font-weight: 400; line-height: 1; }
.s28-faq-list details[open] summary::after { content: '−'; }
.s28-faq-list details p { max-width: 680px; margin: 0 0 19px; color: var(--s28-muted); font-size: 15px; }
.s28-cta { padding: 64px 0 84px; background: var(--s28-bg-alt); color: var(--s28-text); }
.s28-cta .s28-eyebrow { color: var(--s28-accent); }
.s28-cta h2 { max-width: 700px; color: var(--s28-text); }
.s28-cta-inner { display: flex; align-items: end; justify-content: space-between; gap: 42px; }
.s28-cta .s28-button--primary { border: 1px solid rgba(115, 216, 231, .35); background: var(--s28-accent); color: var(--s28-accent-deep) !important; }
.s28-cta .s28-button--primary:hover { background: #a0edf5; }
.s28-js-ready [data-s28-reveal] { opacity: 0; transform: translateY(12px); transition: opacity .48s ease, transform .48s ease; }
.s28-js-ready [data-s28-reveal].is-visible { opacity: 1; transform: none; }
.s28-backup-cn.s28-motion-paused .s28-flow-lines path, .s28-backup-cn.s28-diagram-offscreen .s28-flow-lines path { animation-play-state: paused; }
@media (prefers-reduced-motion: reduce) {
	.s28-backup-cn *, .s28-backup-cn *::before, .s28-backup-cn *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
	.s28-backup-cn [data-s28-reveal] { opacity: 1 !important; transform: none !important; }
}
@media (max-width: 900px) {
	.s28-shell { width: min(100% - 96px, 720px); }
	.s28-risk-list { grid-template-columns: repeat(2, 1fr); }
	.s28-risk-item:nth-child(3) { border-left: 0; padding-left: 0; }
	.s28-risk-item:nth-child(2n + 2) { padding-left: 22px; border-left: 1px solid var(--s28-line); }
	.s28-flow { grid-template-columns: 1fr 1fr; gap: 18px; }
	.s28-flow-lines { display: none; }
	.s28-flow-node--source, .s28-flow-node--policy { min-height: 148px; }
	.s28-copy-group { grid-column: 1 / -1; }
	.s28-flow-node--recovery { grid-column: 1 / -1; justify-self: center; width: min(100%, 360px); }
	.s28-copy-options { gap: 12px; }
	.s28-capability-grid, .s28-faq-layout { grid-template-columns: 1fr; gap: 40px; }
	.s28-delivery-layout { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
	.s28-shell { width: min(100% - 40px, 520px); }
	.s28-hero { min-height: 690px; }
	.s28-hero-media img { object-position: 60% center; }
	.s28-hero-inner { min-height: 690px; padding: 125px 0 48px; align-items: flex-end; }
	.s28-hero-copy { width: 100%; }
	.s28-hero h1 { font-size: clamp(52px, 17vw, 74px); }
	.s28-hero-lead { margin-top: 23px; font-size: 23px; }
	.s28-hero-summary { font-size: 15px; }
	.s28-actions { align-items: stretch; flex-direction: column; margin-top: 26px; }
	.s28-button { width: 100%; }
	.s28-hero-meta { gap: 8px 18px; line-height: 1.5; }
	.s28-hero-meta li + li::before { left: -11px; }
	.s28-section { padding: 44px 0; }
	.s28-section-head--split { grid-template-columns: 1fr; gap: 26px; }
	.s28-section-head h2, .s28-capability-copy h2, .s28-faq-layout h2, .s28-cta h2 { font-size: clamp(31px, 9vw, 44px); }
	.s28-section-intro, .s28-capability-copy > p:not(.s28-eyebrow) { font-size: 16px; }
	.s28-risk-list { grid-template-columns: 1fr; margin-top: 32px; }
	.s28-risk-item, .s28-risk-item + .s28-risk-item, .s28-risk-item:nth-child(2n + 2), .s28-risk-item:nth-child(3) { min-height: 0; padding: 19px 0; border-left: 0; }
	.s28-risk-item:first-child { padding-top: 21px; }
	.s28-diagram { margin-top: 32px; padding: 17px 14px; }
	.s28-diagram-toolbar { align-items: flex-start; flex-direction: column; gap: 15px; padding-bottom: 18px; }
	.s28-motion-toggle { width: 100%; }
	.s28-flow { grid-template-columns: 1fr; gap: 12px; min-height: 0; padding: 24px 0 16px; }
	.s28-flow-node { padding: 16px 12px; }
	.s28-flow-node h3 { font-size: 15px; }
	.s28-flow-node p { font-size: 11px; }
	.s28-flow-node--source, .s28-flow-node--policy { min-height: 142px; }
	.s28-flow-node--source::after, .s28-flow-node--policy::after, .s28-copy-group::after { position: absolute; bottom: -13px; left: 50%; width: 0; height: 12px; border-left: 2px dashed var(--s28-accent); content: ''; opacity: .72; }
	.s28-copy-group { margin-top: 1px; padding: 10px; }
	.s28-group-label { line-height: 1.5; }
	.s28-copy-options { gap: 8px; }
	.s28-flow-node--copy { min-height: 121px; padding: 13px 9px; }
	.s28-flow-node--copy h3 { font-size: 12px; }
	.s28-flow-node--copy p { font-size: 10px; }
	.s28-flow-node--recovery { margin-top: 4px; }
	.s28-diagram-caption { font-size: 11px; }
	.s28-service-table { margin-top: 31px; }
	.s28-service-row { grid-template-columns: 30px 1fr; gap: 8px 12px; padding: 17px 0; }
	.s28-service-row strong { font-size: 16px; }
	.s28-service-row p { grid-column: 2; font-size: 14px; }
	.s28-scenario-list { grid-template-columns: 1fr; margin-top: 24px; }
	.s28-scenario-list li { padding: 11px 0; }
	.s28-delivery-layout { gap: 28px; margin-top: 31px; }
	.s28-delivery-list li { grid-template-columns: 28px 1fr; gap: 6px 10px; padding: 17px 0; }
	.s28-delivery-list p { grid-column: 2; font-size: 14px; }
	.s28-delivery-aside { padding: 21px; }
	.s28-faq-layout { gap: 28px; }
	.s28-faq-list summary { font-size: 16px; }
	.s28-cta { padding: 44px 0 58px; }
	.s28-cta-inner { align-items: stretch; flex-direction: column; gap: 28px; }
}