/* 所有规则仅命中本站 sv-* 类或明确旧版 ID；不 reset html/body/iframe/ins。 */
.sv-header,.sv-main,.sv-footer {--sv-bg:#ffffff;--sv-soft:#f5f7fb;--sv-ink:#18213b;--sv-muted:#657087;--sv-border:#e3e8f1;--sv-primary:#334ee8;--sv-blue-soft:#edf1ff;color:var(--sv-ink);font-family:Inter,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.55;color-scheme:light}
.sv-header {background:var(--sv-bg);border-bottom:1px solid var(--sv-border)}
.sv-header-inner {max-width:1400px;margin:auto;min-height:86px;display:flex;align-items:center;gap:34px;padding:0 38px;box-sizing:border-box}
.sv-brand {display:inline-flex;align-items:center;gap:10px;color:var(--sv-ink);font-weight:760;font-size:25px;letter-spacing:-1px;text-decoration:none}
.sv-brand-icon {display:inline-flex;align-items:center;justify-content:center;width:35px;height:35px;background:var(--sv-primary);border-radius:10px;color:#fff;font-size:27px;font-style:italic;position:relative}
.sv-brand-dot {position:absolute;right:5px;bottom:6px;width:5px;height:5px;background:#a6dcff;border-radius:50%}
.sv-brand-label {font-size:11px;letter-spacing:1.5px;font-weight:650;color:var(--sv-muted);margin-left:12px;border-left:1px solid var(--sv-border);padding-left:20px}
.sv-nav {display:flex;gap:29px;margin-left:auto}.sv-nav a {color:var(--sv-muted);text-decoration:none;font-size:14px;font-weight:600}.sv-nav a:hover {color:var(--sv-primary)}
.sv-main {max-width:1400px;margin:auto;padding:0 38px;box-sizing:border-box;background:var(--sv-bg)}
.sv-intro {padding:40px 0 30px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.sv-eyebrow {color:var(--sv-primary);font-size:11px;font-weight:750;letter-spacing:1.8px;margin:0 0 10px}
.sv-intro h1 {font-size:clamp(27px,3vw,39px);font-weight:690;line-height:1.2;letter-spacing:-1.5px;margin:0 0 12px}.sv-lead {color:var(--sv-muted);margin:0;font-size:16px}
.sv-local-badge {display:flex;gap:12px;align-items:center;font-size:14px}.sv-local-badge small {display:block;color:var(--sv-muted);font-size:12px}.sv-lock {width:39px;height:39px;display:grid;place-items:center;border:1px solid var(--sv-border);border-radius:12px;color:var(--sv-primary);font-size:26px}
.sv-app {border:1px solid var(--sv-border);border-radius:15px;background:var(--sv-bg);box-shadow:0 8px 35px #15264d06}
.sv-toolbar {display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px 20px;border-bottom:1px solid var(--sv-border);flex-wrap:wrap}
.sv-open-group,.sv-tools,.sv-stage-tools,.sv-bottom-actions {display:flex;align-items:center;gap:8px;flex-wrap:wrap}.sv-filename {color:var(--sv-muted);font-size:13px;margin-left:6px;max-width:220px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sv-button {font:600 13px/1.3 Inter,"Segoe UI",Arial,sans-serif;display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:38px;padding:10px 14px;border-radius:7px;border:1px solid var(--sv-border);background:var(--sv-bg);color:var(--sv-ink);cursor:pointer;text-decoration:none;box-sizing:border-box;white-space:nowrap}
.sv-button:hover {background:var(--sv-soft);border-color:#c5cfe4}.sv-primary {background:var(--sv-primary);color:#fff;border-color:var(--sv-primary);box-shadow:0 3px 5px #334ee817}.sv-primary:hover {background:#2941cc;border-color:#2941cc}.sv-quiet {background:transparent;border-color:transparent;color:var(--sv-muted)}.sv-button:disabled,.sv-icon-button:disabled {opacity:.4;cursor:default}
.sv-icon-button {width:34px;min-height:34px;flex-shrink:0;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--sv-muted);font:18px/1 Arial;cursor:pointer}.sv-icon-button:hover {background:var(--sv-soft);color:var(--sv-primary)}
.sv-button:focus-visible,.sv-icon-button:focus-visible,.sv-dropzone:focus-visible,.sv-thumbnail:focus-visible,.sv-stage:focus-visible,.sv-search:focus-visible,.sv-page-input:focus-visible {outline:3px solid #7795ff;outline-offset:3px}
.sv-file-input,.sv-sr-only {position:absolute;width:1px;height:1px;padding:0;margin:-1px;border:0;clip-path:inset(50%);overflow:hidden}
.sv-empty {padding:36px 42px 0;background:linear-gradient(120deg,#f8faff 0%,#f8faff 65%,#f0f4ff 100%);border-radius:0 0 15px 15px}
.sv-dropzone {min-height:295px;border:1.5px dashed #bdcae9;border-radius:11px;text-align:center;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:26px 18px;box-sizing:border-box;cursor:pointer;background:#ffffff94;transition:border-color .15s,background .15s}.sv-dropzone:hover,.sv-dropzone.sv-dragover {border-color:var(--sv-primary);background:#eef2ff}
.sv-file-symbol {width:57px;height:67px;border:1px solid #b7c5f4;background:#edf1ff;border-radius:7px;display:flex;align-items:center;justify-content:center;gap:3px;color:var(--sv-primary);margin-bottom:17px;box-shadow:7px 6px 0 -1px #e4eafe;transform:rotate(-5deg);font-size:21px;font-weight:750}.sv-file-lines {font-size:27px;font-weight:400}.sv-dropzone h2 {font-size:24px;font-weight:650;letter-spacing:-.6px;margin:3px 0 6px}.sv-dropzone p {font-size:14px;color:var(--sv-muted);margin:0 0 22px}.sv-dropzone small {font-size:12px;color:var(--sv-muted);margin-top:14px}
.sv-empty-footer {display:flex;justify-content:center;gap:60px;color:#748099;font-size:12px;padding:22px 10px}
.sv-viewer-caption {display:flex;justify-content:space-between;gap:16px;color:var(--sv-muted);font-size:12px;padding:13px 3px}.sv-key {font:11px/1.2 inherit;border:1px solid var(--sv-border);padding:2px 5px;border-radius:4px;color:var(--sv-muted);background:var(--sv-bg)}
.sv-workspace {display:grid;grid-template-columns:210px minmax(0,1fr)}.sv-sidebar {background:var(--sv-soft);border-right:1px solid var(--sv-border);padding:14px 12px;min-width:0}.sv-sidebar-top {display:flex;justify-content:space-between;align-items:center;margin:0 4px 8px}.sv-sidebar-title {font-size:11px;letter-spacing:1.3px;font-weight:750;color:var(--sv-muted)}.sv-sidebar-title span {background:var(--sv-border);border-radius:4px;margin-left:5px;padding:2px 6px}
.sv-search-wrap {display:block;margin-bottom:15px}.sv-search {box-sizing:border-box;width:100%;background:var(--sv-bg);border:1px solid var(--sv-border);border-radius:6px;padding:8px 10px;color:var(--sv-ink);font:13px/1.4 inherit}.sv-slide-host {display:grid;gap:16px;align-content:start}.sv-thumbnails {max-height:570px;overflow-y:auto;padding:4px}.sv-thumbnail {display:block;padding:4px;background:transparent;border:2px solid transparent;border-radius:6px;cursor:pointer;text-align:left;color:var(--sv-muted);min-width:0;width:100%}.sv-thumbnail:hover {background:var(--sv-border)}.sv-thumbnail[aria-current="true"] {border-color:var(--sv-primary);color:var(--sv-primary);background:var(--sv-blue-soft)}.sv-thumbnail-img {width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;display:block;background:#fff;border:1px solid #d9dfeb;box-sizing:border-box}.sv-thumbnail-label {display:block;font:12px/1.4 Inter,"Segoe UI",Arial,sans-serif;margin:6px 2px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sv-no-results {color:var(--sv-muted);font-size:13px}
.sv-stage-column {min-width:0;align-self:start}.sv-stage-toolbar {padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px solid var(--sv-border)}.sv-slide-title {font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:35%}.sv-stage-tools {gap:2px}.sv-stage-tools .sv-button {min-height:32px;padding:6px 10px;font-size:12px}.sv-zoom-label {min-width:34px;text-align:center;font-size:12px;color:var(--sv-muted)}.sv-present {margin-left:8px}
.sv-stage {background:#edf0f7;min-height:300px;padding:36px;overflow:auto;box-sizing:border-box;max-height:80vh}.sv-stage-content {min-width:0;display:flex;justify-content:center;align-items:center;min-height:280px}.sv-slide-image {display:block;width:100%;height:auto;object-fit:contain;max-height:65vh;box-shadow:0 6px 22px #162b491f;background:#fff}.sv-stage-bottom {display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-top:1px solid var(--sv-border);gap:8px}.sv-pagination {display:flex;align-items:center;gap:6px}.sv-page-label {display:flex;align-items:center;gap:5px;font-size:12px;color:var(--sv-muted)}.sv-page-input {width:40px;box-sizing:border-box;text-align:center;border:1px solid var(--sv-border);border-radius:5px;padding:4px;background:var(--sv-bg);color:var(--sv-ink);font:13px/1.4 inherit;appearance:textfield}.sv-page-input::-webkit-inner-spin-button {appearance:none}.sv-notes {padding:17px 22px;border-top:1px solid var(--sv-border)}.sv-notes h3 {font-size:14px;margin:0 0 8px}.sv-note-text {white-space:pre-wrap;font-size:14px;color:var(--sv-muted);margin:5px 0;overflow-wrap:anywhere}.sv-transcript {font-size:13px;margin-top:12px}.sv-transcript summary {cursor:pointer}
.sv-overview .sv-workspace {grid-template-columns:1fr}.sv-overview .sv-sidebar {border-right:0;background:var(--sv-soft)}.sv-overview .sv-search-wrap {max-width:320px}.sv-overview .sv-slide-host {grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}.sv-overview .sv-thumbnails {max-height:620px}
.sv-app.pptx-converter-fullscreen-mode .sv-workspace {grid-template-columns:1fr}.sv-app.pptx-converter-fullscreen-mode .sv-stage {min-height:60vh}.sv-fullscreen-buttons {padding:10px 16px}.sv-app:fullscreen {box-sizing:border-box;width:100%;height:100%;overflow:auto;border:0;border-radius:0;background:var(--sv-bg)}.sv-app:fullscreen .sv-stage {max-height:none;min-height:0;padding:16px}.sv-app:fullscreen .sv-stage-content {min-height:0;height:calc(100vh - 178px)}.sv-app:fullscreen .sv-slide-image {width:auto;height:auto;max-width:100%;max-height:100%}
.sv-status {display:flex;align-items:center;gap:12px;justify-content:space-between;padding:12px 20px;font-size:14px;background:var(--sv-blue-soft);color:var(--sv-primary)}.sv-status.sv-error {background:#fff0ef;color:#ab2929}.sv-progress-wrap {padding:0 20px}.sv-progress {height:3px;background:var(--sv-border);border-radius:2px}.sv-progress-inner {height:3px;background:var(--sv-primary);width:0;transition:width .15s}.sv-server-options {display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:10px 20px;font-size:13px;background:var(--sv-soft);color:var(--sv-muted)}.sv-server-options select {font:13px/1.5 inherit;color:var(--sv-ink);border:1px solid var(--sv-border);background:var(--sv-bg);padding:6px;border-radius:5px}.sv-compatibility {margin:10px 18px 16px;font-size:13px;color:var(--sv-muted)}.sv-compatibility summary {cursor:pointer}.sv-compatibility li {margin:5px 0}
.sv-features {padding:66px 0 58px}.sv-section-heading h2,.sv-guide h2,.sv-faq h2 {font-size:29px;line-height:1.25;letter-spacing:-.8px;font-weight:650;margin:0 0 12px}.sv-section-heading p:not(.sv-eyebrow) {margin:0;color:var(--sv-muted);font-size:15px}.sv-feature-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:42px;margin-top:32px}.sv-feature {border-top:1px solid var(--sv-border);padding-top:22px}.sv-feature-number {color:var(--sv-primary);font-size:11px;letter-spacing:1.4px;font-weight:700}.sv-feature h3 {font-size:18px;letter-spacing:-.4px;margin:14px 0 9px;font-weight:650}.sv-feature p {color:var(--sv-muted);font-size:15px;line-height:1.75;margin:0;max-width:350px}
.sv-guide {display:grid;grid-template-columns:1fr 1.25fr;gap:75px;padding:42px;border-radius:13px;background:var(--sv-soft);margin-bottom:64px}.sv-guide-intro p:not(.sv-eyebrow) {color:var(--sv-muted);font-size:15px;margin:0 0 23px}.sv-text-link {font-size:14px;font-weight:600;color:var(--sv-primary);text-decoration:none}.sv-steps {padding:0;margin:0;list-style:none;display:grid;gap:24px}.sv-step {display:flex;gap:18px}.sv-step-number {width:29px;height:29px;border:1px solid #ccd6f7;flex-shrink:0;border-radius:50%;color:var(--sv-primary);display:grid;place-items:center;font-size:12px;font-weight:650}.sv-step h3 {margin:0 0 5px;font-size:15px;font-weight:650}.sv-step p {margin:0;color:var(--sv-muted);font-size:14px;line-height:1.7}
.sv-faq {display:grid;grid-template-columns:1fr 1.6fr;gap:65px;padding-bottom:65px}.sv-faq-item {border-bottom:1px solid var(--sv-border);padding:17px 0}.sv-faq-item:first-child {padding-top:0}.sv-faq-item summary {font-size:15px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:10px}.sv-faq-item summary::after {content:'+';color:var(--sv-muted);font-size:20px;line-height:1}.sv-faq-item[open] summary::after {content:'−'}.sv-faq-item p {color:var(--sv-muted);font-size:14px;line-height:1.75;margin:12px 25px 0 0}
.sv-footer {border-top:1px solid var(--sv-border);max-width:1324px;margin:0 auto;padding:27px 0 28px}.sv-footer-brand {font-size:21px}.sv-footer p {font-size:13px;color:var(--sv-muted);margin:5px 0 20px}.sv-footer-links {display:flex;align-items:center;gap:22px;font-size:12px;color:var(--sv-muted)}.sv-footer-links a {color:var(--sv-muted);text-decoration:none}.sv-footer-links span {margin-left:auto}.sv-skip {position:absolute;left:20px;top:-100px;padding:10px;background:#fff;color:#334ee8;z-index:5}.sv-skip:focus {top:10px}
.sv-article {max-width:850px;padding-top:45px;padding-bottom:65px}.sv-article h1 {font-size:38px;line-height:1.2}.sv-article h2 {font-size:22px;margin-top:32px}.sv-article p {color:var(--sv-muted)}.sv-article a {color:var(--sv-primary)}
/* hidden 仅作用于本站明确元素；不会波及 Google 插入的节点。 */
.sv-empty[hidden],.sv-workspace[hidden],.sv-status[hidden],.sv-progress-wrap[hidden],.sv-server-options[hidden],.sv-notes[hidden],.sv-fullscreen-buttons[hidden],.sv-compatibility[hidden],.sv-no-results[hidden],.sv-button[hidden],.sv-thumbnail[hidden],.sv-toolbar[hidden] {display:none}
[data-app-theme="dark"] .sv-header,[data-app-theme="dark"] .sv-main,[data-app-theme="dark"] .sv-footer {--sv-bg:#151c2e;--sv-soft:#1b2539;--sv-ink:#eef2fc;--sv-muted:#a5b3ce;--sv-border:#303c56;--sv-primary:#879aff;--sv-blue-soft:#222f50;color-scheme:dark}
[data-app-theme="dark"] .sv-empty {background:#1b2539}[data-app-theme="dark"] .sv-dropzone {background:#151c2e;border-color:#435784}[data-app-theme="dark"] .sv-stage {background:#101827}[data-app-theme="dark"] .sv-primary {background:#536ff0;color:#fff}[data-app-theme="dark"] .sv-dropzone:hover {background:#222f50}
@media (prefers-color-scheme:dark) {html:not([data-app-theme="light"]):not([data-app-theme="dark"]) .sv-header,html:not([data-app-theme="light"]):not([data-app-theme="dark"]) .sv-main,html:not([data-app-theme="light"]):not([data-app-theme="dark"]) .sv-footer {--sv-bg:#151c2e;--sv-soft:#1b2539;--sv-ink:#eef2fc;--sv-muted:#a5b3ce;--sv-border:#303c56;--sv-primary:#879aff;--sv-blue-soft:#222f50;color-scheme:dark}html:not([data-app-theme="light"]):not([data-app-theme="dark"]) .sv-empty,html:not([data-app-theme="light"]):not([data-app-theme="dark"]) .sv-dropzone {background:#1b2539}html:not([data-app-theme="light"]):not([data-app-theme="dark"]) .sv-stage {background:#101827}}
@media(max-width:1050px) {.sv-brand-label {display:none}.sv-tools {gap:2px}.sv-filename {max-width:150px}.sv-workspace {grid-template-columns:170px minmax(0,1fr)}.sv-stage {padding:20px}.sv-stage-title {max-width:20%}.sv-guide {gap:35px;padding:30px}.sv-footer {margin:0 38px}.sv-feature-grid {gap:25px}}
@media(max-width:760px) {.sv-header-inner {padding:0 20px;min-height:72px;gap:15px}.sv-main {padding:0 20px}.sv-nav {gap:18px}.sv-nav a {font-size:12px}.sv-nav a:first-child {display:none}.sv-brand {font-size:22px}.sv-intro {padding:27px 0 23px}.sv-intro h1 {letter-spacing:-.7px}.sv-local-badge {display:none}.sv-lead {font-size:14px}.sv-empty {padding:20px 20px 0}.sv-empty-footer {gap:18px;font-size:10px}.sv-dropzone {min-height:300px}.sv-dropzone h2 {font-size:22px}.sv-toolbar {padding:12px;gap:7px}.sv-tools {justify-content:flex-end;width:100%}.sv-open-group {width:100%}.sv-filename {max-width:none;flex:1;min-width:0}.sv-workspace {display:flex;flex-direction:column-reverse}.sv-sidebar {border-top:1px solid var(--sv-border);border-right:0}.sv-slide-host {display:flex;gap:12px}.sv-thumbnails {overflow:auto;max-height:none}.sv-thumbnail {width:125px;flex:0 0 125px}.sv-sidebar-top {margin-bottom:0}.sv-search-wrap {max-width:230px}.sv-stage {padding:14px;min-height:200px}.sv-stage-content {min-height:180px}.sv-slide-title {display:none}.sv-stage-toolbar {justify-content:flex-end;padding:8px}.sv-stage-bottom {padding:8px;flex-wrap:wrap}.sv-bottom-actions {gap:0}.sv-bottom-actions .sv-button {font-size:12px;padding:7px 8px}.sv-viewer-caption {font-size:11px}.sv-shortcuts {display:none}.sv-features {padding:42px 0}.sv-feature-grid {grid-template-columns:1fr;gap:25px;margin-top:26px}.sv-feature p {max-width:none}.sv-section-heading h2,.sv-guide h2,.sv-faq h2 {font-size:25px}.sv-feature h3 {margin-top:9px}.sv-guide {grid-template-columns:1fr;gap:28px;padding:24px;margin-bottom:42px}.sv-faq {grid-template-columns:1fr;gap:22px;padding-bottom:42px}.sv-footer {margin:0 20px}.sv-footer-links {flex-wrap:wrap;gap:12px 20px}.sv-footer-links span {margin-left:0;width:100%}.sv-overview .sv-slide-host {display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.sv-overview .sv-thumbnail {width:100%}.sv-overview .sv-workspace {display:block}.sv-present {margin-left:4px}.sv-stage-tools {flex-wrap:nowrap}}
@media(prefers-reduced-motion:reduce) {.sv-dropzone,.sv-progress-inner {transition:none}}

.sv-sidebar[hidden],.sv-stage-column[hidden] {display:none}

/* 仅定位本站生成的打印产物 iframe；不匹配任何广告 iframe。 */
.sv-print-document {position:absolute;width:1px;height:1px;border:0;left:-10000px;top:0}

/* 已打开文档时，只压缩本站的空状态布局，不删除或覆盖外部节点。 */
.sv-has-document .sv-empty {padding:0;background:transparent;border-radius:0}
.sv-has-document .sv-dropzone {min-height:0;padding:0;border:0;border-radius:0;background:transparent;cursor:default;gap:0}
.sv-has-document .sv-dropzone p {margin:0;padding:4px 12px;font-size:13px}
.sv-has-document .sv-empty-footer {padding:0;gap:12px}
.sv-empty .sv-empty-suppressed {display:none}
/* 放映区按实际剩余高度伸缩，避免 65vh 内联样式或固定高度裁掉幻灯片。 */
.sv-app:fullscreen {display:flex;flex-direction:column;overflow:auto}
.sv-app:fullscreen .sv-workspace {display:flex;flex:1 1 0;min-height:0;min-width:0}
.sv-app:fullscreen .sv-stage-column {display:flex;flex-direction:column;flex:1 1 0;align-self:stretch;min-height:0;min-width:0}
.sv-app:fullscreen .sv-stage {display:flex;flex:1 1 0;min-height:0;max-height:none;padding:12px}
.sv-app:fullscreen .sv-stage-content {flex:1;min-height:0;height:100%;width:100%}
.sv-app:fullscreen .sv-stage-toolbar,.sv-app:fullscreen .sv-stage-bottom,.sv-app:fullscreen .sv-fullscreen-buttons {flex-shrink:0}
.sv-app:fullscreen .sv-slide-image {object-fit:contain;box-shadow:none}
.sv-app:fullscreen .sv-sidebar[hidden],.sv-app:fullscreen .sv-stage-column[hidden] {display:none}